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