MSDN:BM_SETSTATE
An application sends a BM_SETSTATE message to change the highlight state of a button. The highlight state indicates whether the button is highlighted as if the user had pushed it.BM_SETSTATE
wParam = (WPARAM) fState; // highlight state
lParam = 0; // not used; must be zero
Parameters
fState
Value of wParam. Specifies whether the button is to be highlighted. A value of TRUE highlights the button. A value of FALSE removes any highlighting.
Return Values
This message always returns zero. Res
Highlighting only affects the appearance of a button. It has no effect on the check state of a radio button or check box. 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. QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winuser.h.See Also
Buttons Overview, Button Messages, BM_GETSTATE, BM_SETCHECK
An application sends a BM_SETSTATE message to change the highlight state of a button. The highlight state indicates whether the button is highlighted as if the user had pushed it.BM_SETSTATE
wParam = (WPARAM) fState; // highlight state
lParam = 0; // not used; must be zero
Parameters
fState
Value of wParam. Specifies whether the button is to be highlighted. A value of TRUE highlights the button. A value of FALSE removes any highlighting.
Return Values
This message always returns zero. Res
Highlighting only affects the appearance of a button. It has no effect on the check state of a radio button or check box. 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. QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winuser.h.See Also
Buttons Overview, Button Messages, BM_GETSTATE, 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. Res
The BM_SETCHECK message has no effect on push buttons. QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winuser.h.See Also
Buttons Overview, Button Messages, BM_GETCHECK, BM_GETSTATE, BM_SETSTATE