API -> GetWindowDC [ Library : user32.dll, Category : Graphical ] [C#, VB, VB.net]

GetWindowDC

Library : user32.dll Category : Graphical

Api Example(s)
CompactPathToWindow - Shorten a path so that it fits a window's width
GetScreenSnapshot - Capture a window or the entire screen
CompactPathToControl - Shorten a path by using ellipses
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WindowPicker - Pick any window using mouse and highlight window region
Capture Screen or any Active Window and print it to fit in one page

API Description :

The GetWindowDC function retrieves the device context (DC) for the entire window, including title bar, menus, and scroll bars. A window device context permits painting anywhere in a window, because the origin of the device context is the upper-left corner

VB Declaration :

Show Multiline Public Private

Declare Function GetWindowDC Lib "user32" (ByVaL hwnd As Long) As Long

Parameters :

· hWnd
Identifies the window with a device context that is to be retrieved.

Return :

If the function succeeds, the return value is the handle of a device context for the specified window. 

If the function fails, the return value is NULL, indicating an error or an invalid hWnd parameter.

OS Requirement :

Requires Windows NT 3.1 or later
Requires Windows 95 or later

Dotnet Replacement :

Any of the following: System.Drawing.Graphics.FromHwnd(Windows.Forms.Control.Handle) System.Windows.Forms.Control.CreateGraphics.GetHdc System.Windows.Forms.PaintEventArgs.Graphics.GetHdc