API -> GetWindowLong [ Library : user32.dll, Category :

GetWindowLong

Library : user32.dll Category : _CategoryNotSet

Api Example(s)
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API Description :

The GetWindowLong function retrieves information about the specified window. The function also retrieves the 32-bit (long) value at the specified offset into the extra window memory of a window.

VB Declaration :

Show Multiline Public Private

Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVaL hwnd As Long, ByVaL nIndex As Long) As Long

Parameters :

· hWnd
Identifies the window and, indirectly, the class to which the window belongs.

· nIndex
Specifies the zero-based offset to the value to be retrieved. Valid values are in the range zero through the number of bytes of extra window memory, minus f

Return :

If the function succeeds, the return value is the requested 32-bit value. 

If the function fails, the return value is zero. To get extended error information, call GetLastError.

OS Requirement :

Requires Windows NT 3.1 or later
Requires Windows 95 or later

Dotnet Replacement :

System.ComponentModel.Component.Events System.Windows.Forms.Control.Parent System.Windows.Forms.Form.CreateParams.ExStyle System.Windows.Forms.Form.CreateParams.Style System.Windows.Forms.Form properties