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SendDlgItemMessage 函数
向对话框中指定的控件发送一个消息。
如果发送线程消息，可使用函数 PostThreadMessage 。
函数原型：
LRESULT WINAPI SendDlgItemMessage (
HWND hDlg,int nIDDlgItem,UINT Msg,WPARAM wParam,LPARAM lParam );
参数
hDlg
类型：HWND
包含控件的对话框句柄。
nIDDlgItem
类型：int
接收消息控件的标识符
Msg
类型：UINT
被发送的消息值
wParam
类型：WPARAM
消息附加值
lParam
类型：LPARAM
消息附加值
返回值
类型：LRESULT
返回消息的处理结果。消息不同，返回值意义不同。
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) |
| 库 | User32.lib |
| DLL | User32.dll |
| UNICODE版本名 | SendDlgItemMessageW |
| ANSI版本名 | SendDlgItemMessageA |
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