在父窗口的WM_COMMAND消息事件中有如下代码:
SendMessage(hwndButton[2],BM_SETCHECK,NULL,NULL);
//其中hwndButton[2] 子窗口风格是 BS_CHECKBOX
任凭你怎么点这个checkbox,前面的圆点始终出不来呢?
SendMessage(hwndButton[2],BM_SETCHECK,NULL,NULL);
//其中hwndButton[2] 子窗口风格是 BS_CHECKBOX
任凭你怎么点这个checkbox,前面的圆点始终出不来呢?
msdn里面有说的吗?请问楼上的大哥您从哪里得知的?
An application sends a BM_SETCHECK message to set the check state of a radio button or check box. To send this message, call the SendMessage function with the following parameters. SendMessage(
(HWND) hWnd, // handle to destination window
BM_SETCHECK, // message to send
(WPARAM) wParam, // check state
(LPARAM) lParam // not used; must be zero
);
Parameters
wParam
Specifies the check state. This parameter can be one of the following values. Value Meaning
BST_CHECKED Sets the button state to checked.
BST_INDETERMINATE Sets the button state to grayed, indicating an indeterminate state. Use this value only if the button has the BS_3STATE or BS_AUTO3STATE style.
BST_UNCHECKED Sets the button state to cleared.
lParam
This parameter is not used.
Return Values
This message always returns zero.