It has nothing to do with Vista. Whatever it is ...
This Program runs here
On a Vista32 with two monitors Samsung Syncmaster 2493HM
On a Vista32 with one monitor HP 2448hc
On Vista64 with one Monitor Samsung T 260
On Vista32 Acer Laptop (2 years old)
On a Vista32 HP Laptop (3 month old)
And it works in both versions (Windowed and Fullscreen 640x480 plus 1920x1200 on the Desktop-PCs - Laptops 1024x768)
This Program runs here
On a Vista32 with two monitors Samsung Syncmaster 2493HM
On a Vista32 with one monitor HP 2448hc
On Vista64 with one Monitor Samsung T 260
On Vista32 Acer Laptop (2 years old)
On a Vista32 HP Laptop (3 month old)
And it works in both versions (Windowed and Fullscreen 640x480 plus 1920x1200 on the Desktop-PCs - Laptops 1024x768)