Edit Box not showing up on Windows 7

I have downloaded the newest version of Wix Toolset and have made a custom dialog开发者_StackOverflow中文版 to get the connection string for the database from the user. When I test run the Msi on a Windows 7 machine, the dialog box is there as well as my display text, but the edit control is not showing up. If I click on where it is supposed to be, I get a cursor and if I start typing then the white background on the textbox shows up. Is this a bug?

Almost certainly this is a Z-order problem where another control is overlapping with the control you want. First, ensure your controls don't overlap. Then, order them in the Dialog element such that the highest z-order are last (IIRC).

I had a similar issue where the edit boxes were "invisible" until I clicked on them. After examining the code, I realized that my controls were being "painted over" by my dialog bitmap. I made the bitmap code the first line in the dialog and this fixed the problem as the controls got "painted over" the bitmap.