Unblock a set of previously blocked windows
void PtUnblockWindows( PtBlockedList_t *bl );
This function unblocks windows that were blocked by PtBlockAllWindows() or PtBlockWindow() and restores their cursors.
The bl argument must either be NULL or the pointer to a control structure returned by PtBlockAllWindows() or PtBlockWindow().
ApModalWait(), PtBlockAllWindows(), PtBlockWindow(), PtMakeModal()
“Modal dialogs” in the Window Management chapter of the Photon Programmer's Guide