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BM_SETCHECK message

Sets the check state of a radio button or check box. You can send this message explicitly or by using the Button_SetCheck macro.

Parameters

wParam

The check state. This parameter can be one of the following values.

ValueMeaning
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 value

This message always returns zero.

Remarks

The BM_SETCHECK message has no effect on push buttons.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Winuser.h (include Windows.h)

See also

Reference
BM_GETCHECK
BM_GETSTATE
BM_SETSTATE

 

 

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