r3conwin
real/widget/r3conwin.h
r3wid
Container drop target window Class
real/windows/r3dtgwin.h
r3Droptargetwindow
R3CLID_DROPTARGETWINDOW
r3Containerwindow
R3CLID_CONTAINERWINDOW - 1228
int R3RegisterContainerWindowClass(R3APP *app);