An application sends a ZGM_GETSELECTEDROW message to get the currently selected row in the ZeeGrid. If no row is selected, this message will return -1.
ZGM_GETSELECTEDROW
wParam = 0; //not used; must be zero
lParam = 0; //not used; must be zero
The currently selected row number is returned. If no row is currently selected, the message returns -1.