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Button_SetCheck 宏
设置单选或复选框的选中状态。
宏内部会发送 BM_SETCHECK 消息，您也可以直接这样做。
调用语序：
LRESULT Button_SetCheck (
HWND hwndCtl,int check );
参数
hwndCtl
类型：HWND
按钮控件的窗口句柄。
check
类型：int
选中状态，根据实际情况，可以是以下值之一：
| 值 | 意义 |
|---|---|
| BST_CHECKED | 选中按钮 |
| BST_INDETERMINATE | 按钮被灰化，表示是中间状态（如果指定了 BS_3STATE 或 BS_AUTO3STATE ） |
| BST_UNCHECKED | 清除按钮选中 |
返回值
类型：LRESULT
总是返回0。
备注
可以使用宏 Button_GetCheck 获取单选或复选框的选中状态。
支持
| 最低桌面系统支持 | Windows Vista |
| 头文件 | Windowsx.h |
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