DOC: DECLARE DLL Example Has Incorrect Information (162445)


The information in this article applies to:

  • Microsoft Visual FoxPro for Windows 3.0
  • Microsoft Visual FoxPro for Windows 3.0b
  • Microsoft Visual FoxPro for Windows 5.0
This article was previously published under Q162445

SUMMARY

The DECLARE - DLL example in Visual FoxPro Help gives the following information about the GetActiveWindow API call:

This example for Windows displays the window handle for the currently active Windows application. When the WAIT window is displayed, you have 5 seconds to press ALT+TAB to switch to a different Windows application, or you can leave Visual FoxPro as the active application.

This gives the impression that the GetActiveWindow API will return a handle for the currently active window. This is wrong. The GetActiveWindow returns only a handle to the Active Window of the calling thread.

MORE INFORMATION

The Win32 API Reference and the Win32API Help file for the GetActiveWindow has the following:

The GetActiveWindow function retrieves the window handle of the active window associated with the thread that calls the function.

HWND GetActiveWindow(VOID)

Parameters

This function has no parameters.

Return Values

If the function succeeds, the return value is the handle of the active window associated with the thread that calls the function. If the calling thread does not have an active window, the return value is NULL.

REFERENCES

Win32 API Help, Win32api.hlp; search on "GetActiveWindow"
Visual FoxPro Help, Foxhelp.hlp; search on "GetActiveWindow"
Modification Type:MajorLast Reviewed:10/15/2003
Keywords:KB162445
©2003 Microsoft Corporation. All rights reserved.