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Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
-
Header File
winuser.h
Unicode
No
Platform Notes
None

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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