An application sends a ZGM_KEEP3DONLOSTFOCUS message to enable or disable the changing of column headers from 3D to flat when ZeeGrid has lost the input focus.
ZGM_KEEP3DONLOSTFOCUS wParam = (WPARAM) (BOOL) fEnable; //enable flag lParam = 0; //not used; must be zero
This message does not return a value.
By default, the column headers and row numbers column will display as flat when input focus is lost. You need to only use this message when you want to change the default behavior of the ZeeGrid.