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BM_SETCHECK Overview  Group

An application sends a BM_SETCHECK message to set the check state of a radio button or check box.

BM_SETCHECK 

wParam = (WPARAM) fCheck; // check state 

lParam = 0;               // not used; must be zero 

 

Parameters

fCheck
Value of 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 unchecked

Return Values

This message always returns zero.

Remarks

The BM_SETCHECK message has no effect on push buttons.

See Also

BM_GETCHECK, BM_GETSTATE, BM_SETSTATE 


file: /Techref/os/win/api/win32/mess/src/msg00_23.htm, 2KB, , updated: 2000/4/7 12:19, local time: 2022/8/17 21:50,
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