BM_GETCHECK

An application sends a BM_GETCHECK message to retrieve the check state of a radio button or check box.

BM_GETCHECK

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

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

Parameters

This message has no parameters.

Return Values

The return value from a button created with the BS_AUTOCHECKBOX, BS_AUTORADIOBUTTON, BS_AUTO3STATE, BS_CHECKBOX, BS_RADIOBUTTON, or BS_3STATE style can be one of the following:

Value	Meaning
BST_CHECKED	Button is checked.
BST_INDETERMINATE	Button is grayed, indicating an indeterminate state (applies only if the button has the BS_3STATE or BS_AUTO3STATE style).
BST_UNCHECKED	Button is unchecked

If the button has any other style, the return value is zero.

See Also

BM_GETSTATE, BM_SETCHECK

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