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BeginPaint

BeginPaint 函数准备绘制窗口,并且填充关于绘制方面的 PAINTSTRUCT 结构体信息。
 函数原型:
 HDC BeginPaint( HWND hwnd, LPPAINTSTRUCT lpPaint );
参数
hwnd
类型:HWND
需要重绘的窗口句柄。

lpPaint
类型:LPPAINTSTRUCT
将要接收信息的 PAINTSTRUCT 结构体指针。LPPAINTSTRUCT 即 PAINTSTRUCT *。
返回值
类型:HDC
如果函数成功,返回设备环境句柄。
如果函数失败,返回NULL,表示没有设备环境可用。
备注
BeginPaint返回的设备环境句柄,就及时调用 EndPaint 结束绘制。一般用来响应 WM_PAINT 消息。
支持
最低桌面系统支持Windows 2000 Professional
头文件Winuser.h (已包含在Windows.h中)
User32.lib
DLLUser32.dll

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