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BM_SETCHECK 消息

设置单选或复选框的选中状态。
可以使用宏 Button_GetCheck 更方便的实现相同功能。
 声明:
#define BM_SETCHECK  0x00F1
参数
wParam
选中状态,根据实际情况,返回值可能是以下之一:

意义
BST_CHECKED按钮被选中
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按钮被清除

lParam
此参数不被使用。
返回值
类型:LRESULT
消息总是返回0
备注
可以使用消息 BM_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Winuser.h (已包含在Windows.h中)

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