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4/8/2010

This message is sent by an application to retrieve the check state of a radio button or check box.

Syntax 

BM_GETCHECK 
wParam = 0; 

lParam = 0;

Parameters

wParam

Not used.

lParam

Not used.

Return Value

A button created with the BS_AUTOCHECKBOX, BS_AUTORADIOBUTTON, BS_AUTO3STATE, BS_CHECKBOX, BS_RADIOBUTTON, or BS_3STATE returns one of the values described in the following table.

Value Description

BST_CHECKED

The button is checked.

BST_INDETERMINATE

The button is grayed, indicating an indeterminate state (applies only if the button has the BS_3STATE or BS_AUTO3STATE style).

BST_UNCHECKED

The button is unchecked.

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

Requirements

Header winuser.h
Windows Embedded CE Windows CE 1.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also