The ChangeOnKey property specifies the code of the last key that alters the control's text. Use the Change event to notify you application that the user changes the text in the control. Use the Text property to access the control's text. Use the CodeCompletion property to disable the code completion support. By default, the user can display the control's context window by pressing the CTRL + SPACE key combination. Use the ContextKey property to define the key combination to open the control's context window. 

How can I provide different sensitive context?

VBA (MS Access, Excell...)

' Change event - Indicates that the control's text have changed.
Private Sub Edit1_Change()
	With Edit1
		.ShowContext .ChangeOnKey
	End With
End Sub

With Edit1
	.Text = ""
	.InsertText "Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context"
	With .Context()
		.Add "General_1"
		.Add "General_2"
	End With
	With .Context("46")
		.Add "Property_1"
		.Add "Property_2"
		.Add "Property_3"
	End With
	With .Context("58")
		.Add "Method_1"
		.Add "Method_2"
		.Add "Method_3"
	End With
End With

VB6

' Change event - Indicates that the control's text have changed.
Private Sub Edit1_Change()
	With Edit1
		.ShowContext .ChangeOnKey
	End With
End Sub

With Edit1
	.Text = ""
	.InsertText "Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context"
	With .Context()
		.Add "General_1"
		.Add "General_2"
	End With
	With .Context("46")
		.Add "Property_1"
		.Add "Property_2"
		.Add "Property_3"
	End With
	With .Context("58")
		.Add "Method_1"
		.Add "Method_2"
		.Add "Method_3"
	End With
End With

VB.NET

' Change event - Indicates that the control's text have changed.
Private Sub Exedit1_Change(ByVal sender As System.Object) Handles Exedit1.Change
	With Exedit1
		.ShowContext(.ChangeOnKey)
	End With
End Sub

With Exedit1
	.Text = ""
	.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context")
	With .get_Context()
		.Add("General_1")
		.Add("General_2")
	End With
	With .get_Context("46")
		.Add("Property_1")
		.Add("Property_2")
		.Add("Property_3")
	End With
	With .get_Context("58")
		.Add("Method_1")
		.Add("Method_2")
		.Add("Method_3")
	End With
End With

VB.NET for /COM

' Change event - Indicates that the control's text have changed.
Private Sub AxEdit1_Change(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AxEdit1.Change
	With AxEdit1
		.ShowContext(.ChangeOnKey)
	End With
End Sub

With AxEdit1
	.Text = ""
	.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context")
	With .get_Context()
		.Add("General_1")
		.Add("General_2")
	End With
	With .get_Context("46")
		.Add("Property_1")
		.Add("Property_2")
		.Add("Property_3")
	End With
	With .get_Context("58")
		.Add("Method_1")
		.Add("Method_2")
		.Add("Method_3")
	End With
End With

C++

// Change event - Indicates that the control's text have changed.
void OnChangeEdit1()
{
	/*
		Copy and paste the following directives to your header file as
		it defines the namespace 'EXEDITLib' for the library: 'ExEdit 1.0 Control Library'
		#import <ExEdit.dll>
		using namespace EXEDITLib;
	*/
	EXEDITLib::IEditPtr spEdit1 = GetDlgItem(IDC_EDIT1)->GetControlUnknown();
	spEdit1->ShowContext(spEdit1->GetChangeOnKey());
}

EXEDITLib::IEditPtr spEdit1 = GetDlgItem(IDC_EDIT1)->GetControlUnknown();
spEdit1->PutText(L"");
spEdit1->InsertText(L"Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context",vtMissing);
EXEDITLib::IEditContextPtr var_Context = spEdit1->GetContext(vtMissing);
	var_Context->Add(L"General_1",vtMissing,vtMissing,vtMissing);
	var_Context->Add(L"General_2",vtMissing,vtMissing,vtMissing);
EXEDITLib::IEditContextPtr var_Context1 = spEdit1->GetContext("46");
	var_Context1->Add(L"Property_1",vtMissing,vtMissing,vtMissing);
	var_Context1->Add(L"Property_2",vtMissing,vtMissing,vtMissing);
	var_Context1->Add(L"Property_3",vtMissing,vtMissing,vtMissing);
EXEDITLib::IEditContextPtr var_Context2 = spEdit1->GetContext("58");
	var_Context2->Add(L"Method_1",vtMissing,vtMissing,vtMissing);
	var_Context2->Add(L"Method_2",vtMissing,vtMissing,vtMissing);
	var_Context2->Add(L"Method_3",vtMissing,vtMissing,vtMissing);

C++ Builder

// Change event - Indicates that the control's text have changed.
void __fastcall TForm1::Edit1Change(TObject *Sender)
{
	Edit1->ShowContext(TVariant(Edit1->ChangeOnKey));
}

Edit1->Text = L"";
Edit1->InsertText(L"Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context",TNoParam());
Exeditlib_tlb::IEditContextPtr var_Context = Edit1->Context[TNoParam()];
	var_Context->Add(L"General_1",TNoParam(),TNoParam(),TNoParam());
	var_Context->Add(L"General_2",TNoParam(),TNoParam(),TNoParam());
Exeditlib_tlb::IEditContextPtr var_Context1 = Edit1->Context[TVariant("46")];
	var_Context1->Add(L"Property_1",TNoParam(),TNoParam(),TNoParam());
	var_Context1->Add(L"Property_2",TNoParam(),TNoParam(),TNoParam());
	var_Context1->Add(L"Property_3",TNoParam(),TNoParam(),TNoParam());
Exeditlib_tlb::IEditContextPtr var_Context2 = Edit1->Context[TVariant("58")];
	var_Context2->Add(L"Method_1",TNoParam(),TNoParam(),TNoParam());
	var_Context2->Add(L"Method_2",TNoParam(),TNoParam(),TNoParam());
	var_Context2->Add(L"Method_3",TNoParam(),TNoParam(),TNoParam());

C#

// Change event - Indicates that the control's text have changed.
private void exedit1_Change(object sender)
{
	exedit1.ShowContext(exedit1.ChangeOnKey);
}
//this.exedit1.Change += new exontrol.EXEDITLib.exg2antt.ChangeEventHandler(this.exedit1_Change);

exedit1.Text = "";
exedit1.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context",null);
exontrol.EXEDITLib.Context var_Context = exedit1.get_Context(null);
	var_Context.Add("General_1",null,null,null);
	var_Context.Add("General_2",null,null,null);
exontrol.EXEDITLib.Context var_Context1 = exedit1.get_Context("46");
	var_Context1.Add("Property_1",null,null,null);
	var_Context1.Add("Property_2",null,null,null);
	var_Context1.Add("Property_3",null,null,null);
exontrol.EXEDITLib.Context var_Context2 = exedit1.get_Context("58");
	var_Context2.Add("Method_1",null,null,null);
	var_Context2.Add("Method_2",null,null,null);
	var_Context2.Add("Method_3",null,null,null);

JScript/JavaScript

<BODY onload="Init()">
<SCRIPT FOR="Edit1" EVENT="Change()" LANGUAGE="JScript">
	Edit1.ShowContext(Edit1.ChangeOnKey);
</SCRIPT>

<OBJECT CLASSID="clsid:39136531-DD0F-4281-B445-E36FC2CDDBC5" id="Edit1"></OBJECT>

<SCRIPT LANGUAGE="JScript">
function Init()
{
	Edit1.Text = "";
	Edit1.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context",null);
	var var_Context = Edit1.Context(null);
		var_Context.Add("General_1",null,null,null);
		var_Context.Add("General_2",null,null,null);
	var var_Context1 = Edit1.Context("46");
		var_Context1.Add("Property_1",null,null,null);
		var_Context1.Add("Property_2",null,null,null);
		var_Context1.Add("Property_3",null,null,null);
	var var_Context2 = Edit1.Context("58");
		var_Context2.Add("Method_1",null,null,null);
		var_Context2.Add("Method_2",null,null,null);
		var_Context2.Add("Method_3",null,null,null);
}
</SCRIPT>
</BODY>

VBScript

<BODY onload="Init()">
<SCRIPT LANGUAGE="VBScript">
Function Edit1_Change()
	With Edit1
		.ShowContext .ChangeOnKey
	End With
End Function
</SCRIPT>

<OBJECT CLASSID="clsid:39136531-DD0F-4281-B445-E36FC2CDDBC5" id="Edit1"></OBJECT>

<SCRIPT LANGUAGE="VBScript">
Function Init()
	With Edit1
		.Text = ""
		.InsertText "Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context"
		With .Context()
			.Add "General_1"
			.Add "General_2"
		End With
		With .Context("46")
			.Add "Property_1"
			.Add "Property_2"
			.Add "Property_3"
		End With
		With .Context("58")
			.Add "Method_1"
			.Add "Method_2"
			.Add "Method_3"
		End With
	End With
End Function
</SCRIPT>
</BODY>

C# for /COM

// Change event - Indicates that the control's text have changed.
private void axEdit1_Change(object sender, EventArgs e)
{
	axEdit1.ShowContext(axEdit1.ChangeOnKey);
}
//this.axEdit1.Change += new EventHandler(this.axEdit1_Change);

axEdit1.Text = "";
axEdit1.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context",null);
EXEDITLib.Context var_Context = axEdit1.get_Context(null);
	var_Context.Add("General_1",null,null,null);
	var_Context.Add("General_2",null,null,null);
EXEDITLib.Context var_Context1 = axEdit1.get_Context("46");
	var_Context1.Add("Property_1",null,null,null);
	var_Context1.Add("Property_2",null,null,null);
	var_Context1.Add("Property_3",null,null,null);
EXEDITLib.Context var_Context2 = axEdit1.get_Context("58");
	var_Context2.Add("Method_1",null,null,null);
	var_Context2.Add("Method_2",null,null,null);
	var_Context2.Add("Method_3",null,null,null);

X++ (Dynamics Ax 2009)

// Change event - Indicates that the control's text have changed.
void onEvent_Change()
{
	;
	exedit1.ShowContext(exedit1.ChangeOnKey());
}

public void init()
{
	COM com_Context,com_Context1,com_Context2;
	anytype var_Context,var_Context1,var_Context2;
	;

	super();

	exedit1.Text("");
	exedit1.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context");
	var_Context = exedit1.Context(); com_Context = var_Context;
		com_Context.Add("General_1");
		com_Context.Add("General_2");
	var_Context1 = exedit1.Context("46"); com_Context1 = var_Context1;
		com_Context1.Add("Property_1");
		com_Context1.Add("Property_2");
		com_Context1.Add("Property_3");
	var_Context2 = exedit1.Context("58"); com_Context2 = var_Context2;
		com_Context2.Add("Method_1");
		com_Context2.Add("Method_2");
		com_Context2.Add("Method_3");
}

Delphi 8 (.NET only)

// Change event - Indicates that the control's text have changed.
procedure TWinForm1.AxEdit1_Change(sender: System.Object; e: System.EventArgs);
begin
	with AxEdit1 do
	begin
		ShowContext(TObject(ChangeOnKey));
	end
end;

with AxEdit1 do
begin
	Text := '';
	InsertText('Press .(dot), :(colon) or CTRL + SPACE to invoke the control''s context',Nil);
	with get_Context(Nil) do
	begin
		Add('General_1',Nil,Nil,Nil);
		Add('General_2',Nil,Nil,Nil);
	end;
	with get_Context('46') do
	begin
		Add('Property_1',Nil,Nil,Nil);
		Add('Property_2',Nil,Nil,Nil);
		Add('Property_3',Nil,Nil,Nil);
	end;
	with get_Context('58') do
	begin
		Add('Method_1',Nil,Nil,Nil);
		Add('Method_2',Nil,Nil,Nil);
		Add('Method_3',Nil,Nil,Nil);
	end;
end

Delphi (standard)

// Change event - Indicates that the control's text have changed.
procedure TForm1.Edit1Change(ASender: TObject; );
begin
	with Edit1 do
	begin
		ShowContext(OleVariant(ChangeOnKey));
	end
end;

with Edit1 do
begin
	Text := '';
	InsertText('Press .(dot), :(colon) or CTRL + SPACE to invoke the control''s context',Null);
	with Context[Null] do
	begin
		Add('General_1',Null,Null,Null);
		Add('General_2',Null,Null,Null);
	end;
	with Context['46'] do
	begin
		Add('Property_1',Null,Null,Null);
		Add('Property_2',Null,Null,Null);
		Add('Property_3',Null,Null,Null);
	end;
	with Context['58'] do
	begin
		Add('Method_1',Null,Null,Null);
		Add('Method_2',Null,Null,Null);
		Add('Method_3',Null,Null,Null);
	end;
end

VFP

*** Change event - Indicates that the control's text have changed. ***
LPARAMETERS nop
	with thisform.Edit1
		.ShowContext(.ChangeOnKey)
	endwith

with thisform.Edit1
	.Text = ""
	.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context")
	with .Context()
		.Add("General_1")
		.Add("General_2")
	endwith
	with .Context("46")
		.Add("Property_1")
		.Add("Property_2")
		.Add("Property_3")
	endwith
	with .Context("58")
		.Add("Method_1")
		.Add("Method_2")
		.Add("Method_3")
	endwith
endwith

dBASE Plus

/*
with (this.EXEDITACTIVEXCONTROL1.nativeObject)
	Change = class::nativeObject_Change
endwith
*/
// Indicates that the control's text have changed.
function nativeObject_Change()
	oEdit = form.EXEDITACTIVEXCONTROL1.nativeObject
	oEdit.ShowContext(oEdit.ChangeOnKey)
return

local oEdit,var_Context,var_Context1,var_Context2

oEdit = form.EXEDITACTIVEXCONTROL1.nativeObject
oEdit.Text = ""
oEdit.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context")
var_Context = oEdit.Context()
	var_Context.Add("General_1")
	var_Context.Add("General_2")
var_Context1 = oEdit.Context("46")
	var_Context1.Add("Property_1")
	var_Context1.Add("Property_2")
	var_Context1.Add("Property_3")
var_Context2 = oEdit.Context("58")
	var_Context2.Add("Method_1")
	var_Context2.Add("Method_2")
	var_Context2.Add("Method_3")

XBasic (Alpha Five)

' Indicates that the control's text have changed.
function Change as v ()
	oEdit = topparent:CONTROL_ACTIVEX1.activex
	oEdit.ShowContext(oEdit.ChangeOnKey)
end function

Dim oEdit as P
Dim var_Context as P
Dim var_Context1 as P
Dim var_Context2 as P

oEdit = topparent:CONTROL_ACTIVEX1.activex
oEdit.Text = ""
oEdit.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context")
var_Context = oEdit.Context()
	var_Context.Add("General_1")
	var_Context.Add("General_2")
var_Context1 = oEdit.Context("46")
	var_Context1.Add("Property_1")
	var_Context1.Add("Property_2")
	var_Context1.Add("Property_3")
var_Context2 = oEdit.Context("58")
	var_Context2.Add("Method_1")
	var_Context2.Add("Method_2")
	var_Context2.Add("Method_3")

Visual Objects

METHOD OCX_Exontrol1Change() CLASS MainDialog
	// Change event - Indicates that the control's text have changed.
	oDCOCX_Exontrol1:ShowContext(oDCOCX_Exontrol1:ChangeOnKey)
RETURN NIL

local var_Context,var_Context1,var_Context2 as IEditContext

oDCOCX_Exontrol1:Text := ""
oDCOCX_Exontrol1:InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context",nil)
var_Context := oDCOCX_Exontrol1:[Context,nil]
	var_Context:Add("General_1",nil,nil,nil)
	var_Context:Add("General_2",nil,nil,nil)
var_Context1 := oDCOCX_Exontrol1:[Context,"46"]
	var_Context1:Add("Property_1",nil,nil,nil)
	var_Context1:Add("Property_2",nil,nil,nil)
	var_Context1:Add("Property_3",nil,nil,nil)
var_Context2 := oDCOCX_Exontrol1:[Context,"58"]
	var_Context2:Add("Method_1",nil,nil,nil)
	var_Context2:Add("Method_2",nil,nil,nil)
	var_Context2:Add("Method_3",nil,nil,nil)

PowerBuilder

/*begin event Change() - Indicates that the control's text have changed.*/
/*
	oEdit = ole_1.Object
	oEdit.ShowContext(oEdit.ChangeOnKey)
*/
/*end event Change*/

OleObject oEdit,var_Context,var_Context1,var_Context2

oEdit = ole_1.Object
oEdit.Text = ""
oEdit.InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context")
var_Context = oEdit.Context()
	var_Context.Add("General_1")
	var_Context.Add("General_2")
var_Context1 = oEdit.Context("46")
	var_Context1.Add("Property_1")
	var_Context1.Add("Property_2")
	var_Context1.Add("Property_3")
var_Context2 = oEdit.Context("58")
	var_Context2.Add("Method_1")
	var_Context2.Add("Method_2")
	var_Context2.Add("Method_3")

Visual DataFlex

// Indicates that the control's text have changed.
Procedure OnComChange 
	Forward Send OnComChange 
	Send ComShowContext (ComChangeOnKey(Self))
End_Procedure

Procedure OnCreate
	Forward Send OnCreate
	Set ComText to ""
	Send ComInsertText "Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context" Nothing
	Variant voContext
	Get ComContext Nothing to voContext
	Handle hoContext
	Get Create (RefClass(cComContext)) to hoContext
	Set pvComObject of hoContext to voContext
		Send ComAdd of hoContext "General_1" Nothing Nothing Nothing
		Send ComAdd of hoContext "General_2" Nothing Nothing Nothing
	Send Destroy to hoContext
	Variant voContext1
	Get ComContext "46" to voContext1
	Handle hoContext1
	Get Create (RefClass(cComContext)) to hoContext1
	Set pvComObject of hoContext1 to voContext1
		Send ComAdd of hoContext1 "Property_1" Nothing Nothing Nothing
		Send ComAdd of hoContext1 "Property_2" Nothing Nothing Nothing
		Send ComAdd of hoContext1 "Property_3" Nothing Nothing Nothing
	Send Destroy to hoContext1
	Variant voContext2
	Get ComContext "58" to voContext2
	Handle hoContext2
	Get Create (RefClass(cComContext)) to hoContext2
	Set pvComObject of hoContext2 to voContext2
		Send ComAdd of hoContext2 "Method_1" Nothing Nothing Nothing
		Send ComAdd of hoContext2 "Method_2" Nothing Nothing Nothing
		Send ComAdd of hoContext2 "Method_3" Nothing Nothing Nothing
	Send Destroy to hoContext2
End_Procedure

XBase++

PROCEDURE OnChange(oEdit)
	oEdit:ShowContext(oEdit:ChangeOnKey())
RETURN

#include "AppEvent.ch"
#include "ActiveX.ch"

PROCEDURE Main
 	LOCAL oForm
	LOCAL nEvent := 0, mp1 := NIL, mp2 := NIL, oXbp := NIL
	LOCAL oEdit
	LOCAL oContext,oContext1,oContext2

	oForm := XbpDialog():new( AppDesktop() )
	oForm:drawingArea:clipChildren := .T.
	oForm:create( ,,{100,100}, {640,480},, .F. )
	oForm:close  := {|| PostAppEvent( xbeP_Quit )}

	oEdit := XbpActiveXControl():new( oForm:drawingArea )
	oEdit:CLSID  := "Exontrol.Edit.1" /*{39136531-DD0F-4281-B445-E36FC2CDDBC5}*/
	oEdit:create(,, {10,60},{610,370} )

		oEdit:Change := {|| OnChange(oEdit)} /*Indicates that the control's text have changed.*/

		oEdit:Text := ""
		oEdit:InsertText("Press .(dot), :(colon) or CTRL + SPACE to invoke the control's context")
		oContext := oEdit:Context()
			oContext:Add("General_1")
			oContext:Add("General_2")
		oContext1 := oEdit:Context("46")
			oContext1:Add("Property_1")
			oContext1:Add("Property_2")
			oContext1:Add("Property_3")
		oContext2 := oEdit:Context("58")
			oContext2:Add("Method_1")
			oContext2:Add("Method_2")
			oContext2:Add("Method_3")

	oForm:Show()
	DO WHILE nEvent != xbeP_Quit
		nEvent := AppEvent( @mp1, @mp2, @oXbp )
		oXbp:handleEvent( nEvent, mp1, mp2 )
	ENDDO 
RETURN