dlg_load_dialog
int dlg_load_dialog (wchar_t *filename, int *key);
Load a dialog definition file.
This function loads a DCL dialog control language file. DCL files must be loaded before progeCAD can display a custom dialog box.
The filename argument is the name of the DCL file.
The key argument is a system name for the dialog box, which is used by the key argument in other DLG functions.
This function returns the ID (a positive integer) of the loaded DCL file, or -1 if the DCL file cannot be loaded.