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| #define  | BN_CLICKED   0 | 
|   | The BN_CLICKED notification message is sent when the user clicks a button.  More...
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| #define  | BN_DBLCLK   BN_DOUBLECLICKED | 
|   | The BN_DBLCLK notification message is sent when the user double-clicks a button.  More...
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| #define  | BN_HILITE   2 | 
|   | The BN_HILITE notification message is sent when the user hilite a button (the user moves the mouse onto it)  More...
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| #define  | BN_UNHILITE   3 | 
|   | The BN_UNHILITE notification message is sent when the user unhilite a button, (the user moves the mouse leaving it)  More...
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| #define  | BN_PUSHED   4 | 
|   | The BN_PUSHED notification message is sent when the user pushes a button.  More...
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| #define  | BN_UNPUSHED   5 | 
|   | The BN_UNPUSHED notification message is sent when the user unpushes a button.  More...
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| #define  | BN_DISABLE   6 | 
|   | The BN_DISABLE notification message is sent when the user disables a button. (the user sends BM_ENABLE(wParam == FALSE) to it)  More...
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| #define  | BN_ENABLE   7 | 
|   | The BN_DISABLE notification message is sent when the user disables a button. (the user sends BM_ENABLE(wParam == TRUE) to it)  More...
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| #define  | BN_SETFOCUS   8 | 
|   | The BN_SETFOCUS notification message is sent when a button receives the keyboard focus.  More...
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| #define  | BN_KILLFOCUS   9 | 
|   | The BN_KILLFOCUS notification message is sent when a button loses the keyboard focus.  More...
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