BM_SETCHECK
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