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GetFocus Reference in C#, VB.NET and VB6

Library:user32.dll

Visual Basic 6 definition
Declare Function GetFocus Lib "user32.dll" () As Long

Visual Basic .NET definition
Declare Function GetFocus Lib "user32" () As Integer

C# definition
[DllImport("user32")] public static extern int GetFocus(int hwnd)

Description

GetFocus obtains a handle to the window in the calling thread that has the input focus. If another program has the input focus, however, this function will not work and will report an error. GetFocus Retrieves the handle to the window that has the keyboard focus. System.Windows.Forms.Control.Controls[].Focused

Return Value

If successful, the function returns a handle to the window that has the input focus. If an error occured, or if another program has the input focus, the function returns zero (use GetLastError to get the error code).

Parameters

Further Information:

For further information on Windows API functions such as these, and how to use these API's in your C# and VB.NET applications, please refer to the book 'Network programming in .NET' (Buy at Amazon UK) (Buy at Amazon US)

Visual Basic 6 example source code

C# example source code

Provide a code example

C#
VB.NET
VB6




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