Value
| Meaning
|
0x0003
| Specifies the check state (radio buttons and check boxes only). A value of
BST_UNCHECKED indicates the button is unchecked; a value of BST_CHECKED indicates
the button is checked. A radio button is checked when it contains a dot; a
check box is checked when it contains an X. A value of BST_INDETERMINATE indicates
the check state is indeterminate (applies only if the button has the BS_3STATE
or BS_AUTO3STATE style). A three-state check box is grayed when its state is
indeterminate.
|
BST_CHECKED
| Indicates the button is checked.
|
BST_FOCUS
| Specifies the focus state. A nonzero value indicates that the button has the
keyboard focus.
|
BST_INDETERMINATE
| Indicates the button is grayed because the state of the button is
indeterminate. This value applies only if the button has the BS_3STATE or BS_AUTO3STATE
style.
|
BST_PUSHED
| Specifies the highlight state. A nonzero value indicates that the button is
highlighted. A button is automatically highlighted when the user positions the
cursor over it and presses and holds the left mouse button. The highlighting is
removed when the user releases the mouse button.
|
BST_UNCHECKED
| Indicates the button is unchecked. Same as the Windows NT return value of zero.
|
An application sends a BM_GETSTATE message to determine the state of a button
or check box.
BM_GETSTATE
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 specifies the current state of the button. You can use the
following bitmasks to extract information about the state: