Retrieves information about the specified button in a toolbar.
TB_GETBUTTON
wParam = (WPARAM) iButton;
lParam = (LPARAM) (LPTBBUTTON) lpButton;
Returns TRUE if successful, or FALSE otherwise.
Windows NT/2000: Requires Windows NT 3.51 or later
Windows 95/98: Requires Windows 95 or later
Header: Declared in commctrl.h.