GetUpdateRgn |
VB声明 |
|
Declare Function GetUpdateRgn Lib "user32" Alias "GetUpdateRgn" (ByVal hwnd As Long, ByVal hRgn As Long, ByVal fErase As Long) As Long |
|
说明 |
|
确定指定窗口的刷新区域。该区域当前无效,需要刷新 |
|
返回值 |
|
Long,下列常数之一,以描述当前剪裁区: COMPLEXREGION:该区域有互相交叠的边界 SIMPLEREGION:该区域边界没有互相交叠 NULLREGION:区域为空 ERRORAPI:发生了错误 |
|
参数表 |
|
参数 |
类型及说明 |
hwnd |
Long,将确定刷新区域的窗口的句柄 |
hRgn |
Long,装载hwnd窗口刷新区域的区域句柄 |
fErase |
Long,为非零值表示窗口背景应擦除,客户区外的窗口部分是被重画 原文:TRUE (nonzero) to specify that the window background should be erased and parts of the window outside of the client area should be redrawn. |
Top |