Problem creating custom dialog boxes under windows 7.
I am replacing the left side panel with the computer icon image on the dialog boxes with my companies logo. I deleted the original image, then added a bitmap to the dialog box(s). The replacement bitmap looks great regardless of the resolution when I run the installation on a windows XP box. However when I run the same installation at the same resolutions on a Windows 7 box the bitmap of my company's logo dialog boxes shows up with horrible pixelation.
I created the dialog boxes first in IS2009, then again on IS2011. With the same results.
Can you reduce the bit-depth of the bmp to 256 colors? If your current BMP is 32 bit try 16-bit, or go all the way down to 8-bit. While 8-bit doesn't give you a whole lot to work with - at least you would have control of the way it looked rather then leaving it up to the installers behavior on a given OS.
