GetDC、GetWindowDC

GetDC、GetWindowDC兩個API的用法一樣，不一樣的地方在於

GetDC　：取得視窗的包含工作區的畫面
GetWindowDC　：取得視窗的不包含工作區的畫面

宣告法：

Declare Function GetDC Lib "user32" Alias "GetDC" (ByVal hwnd As Long) As Long

Declare Function GetWindowDC Lib "user32" Alias "GetWindowDC" (ByVal hwnd As Long) As Long

範例：

Dim MDC As Long
MDC = GetWindowDC(某視窗hWnd)

實戰個案：