01-10-2019, 12:38 PM
Your code creates new objects on every message received by the dialog procedure. Probably should be
GdPictureImaging- Gdp
GdViewer- GdViewer1
...
case WM_INITDIALOG
Gdp._create()
GdViewer1._create()
GdPictureImaging- Gdp
GdViewer- GdViewer1
...
case WM_INITDIALOG
Gdp._create()
GdViewer1._create()