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WM_CREATE 消息
当调用 CreateWindow 或 CreateWindowEx 函数创建窗口时发送的应用程序请求消息，WM_CREATE 消息在创建窗口函数未返回时即被发送。窗口过程 WindowProc 会在窗口被创建之后，显示之前，收到 WM_CREATE 消息。
声明：
#define WM_CREATE 0x0001
参数
返回值
类型：LRESULT
如果应用程序处理了这个消息，应该返回0来让系统继续创建窗口。如果返回-1，窗口会被销毁并且 CreateWindow 或 CreateWindowEx 函数返回NULL。
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) |
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