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First, you don't need an MDI.<br />
Second, if you have the hwnd of those windows, use SetFocus Api to give focus to desired window.<br />
Private Declare Function API_SetFocus Lib &quot;user32&quot; Alias &quot;SetFocus&quot; (ByVal hwnd As Long) As Long<br />
<br />
'usage:<br />
API_SetFocus hwnd
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First, you don't need an MDI.
Second, if you have the hwnd of those windows, use SetFocus Api to give focus to desired window.
Private Declare Function API_SetFocus Lib "user32" Alias "SetFocus" (ByVal hwnd As Long) As Long

'usage:
API_SetFocus hwnd

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Okay,<br />
<br />
This example works great with Calc and Notepad.<br />
<br />
I am using 2 Visual Basic applications, one application is designed to be a master application, and the other an extension. When i try to use the above example to call my secondary application and contain it to the parent master application, it doesn't work. IE, the executed application still floats around and looses focus as usual. If i change the line back to calc or notepad, works great.<br />
<br />
Is there a better way to getting a compiled VB app to Child to another VB app?
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Okay,

This example works great with Calc and Notepad.

I am using 2 Visual Basic applications, one application is designed to be a master application, and the other an extension. When i try to use the above example to call my secondary application and contain it to the parent master application, it doesn't work. IE, the executed application still floats around and looses focus as usual. If i change the line back to calc or notepad, works great.

Is there a better way to getting a compiled VB app to Child to another VB app?

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<div class="content wysiwyg-content">
I've used the SetParent API to host various windows within in VB(6 sp5) MDI form, but I cannot seem to reference or set as active the created window(s). I've used ChildWindowFromPoint to return the hwnd of the child, but this is flaky at best.<br />
<br />
Has anyone seen or have got a good example of how to do this? 
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I've used the SetParent API to host various windows within in VB(6 sp5) MDI form, but I cannot seem to reference or set as active the created window(s). I've used ChildWindowFromPoint to return the hwnd of the child, but this is flaky at best.

Has anyone seen or have got a good example of how to do this? 

Using SetParent API

Visual Basic is Microsoft’s event-driven programming language and integrated development environment (IDE) for its Component Object Model (COM) programming model. It is relatively easy to learn and use because of its graphical development features and BASIC heritage. It has been replaced with VB.NET, and is very similar to VBA (Visual Basic for Applications), the programming language for the Microsoft Office product line.