Search
Module:
Directory

   Desktop Functions:

   Smart Device Functions:


Show Recent Changes
Subscribe (RSS)
Misc. Pages
Comments
FAQ
Helpful Tools
Playground
Suggested Reading
Website TODO List
Download Visual Studio Add-In

GetActiveWindow (user32)
 
.
Summary

C# Signature:

[DllImport("user32.dll")]
static extern IntPtr GetActiveWindow();

VB.NET Signature:

<DllImport("user32.dll", SetLastError:=True)> _
Private Shared Function GetActiveWindow() As IntPtr
End Function

VB Signature:

Public Declare Function GetActiveWindow Lib "user32.dll" () As Long
<DllImport("user32.dll", SetLastError:=True)> _
Private Shared Function GetActiveWindow() As IntPtr
End Function

Alternate VB Signature:

Public Declare Auto Function GetActiveWindow Lib "user32.dll" () As IntPtr

User-Defined Types:

None.

Notes:

GetActiveWindow() will only return if the calling thread is in focus.

Please add some!

Tips & Tricks:

Can be used to find the active window Hwnd for GetWindowText

Sample Code:

Inside a Windows Form:

if (GetActiveWindow() == Handle) {
    // The Form is the active window
}

Alternative Managed API:

Do you know one? Please contribute it!

Documentation

Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

 
Access PInvoke.net directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version
Revisions