Where is the Installing string used in the mini window?

[psiegel]

During installation, a little window appears that contains just the InstallShield logo and the word "Installing". I've been asked to add translations for this string to our non-English builds, but I can't figure out how this window is created or where the string value is set.

Here's a picture that probably better explains what I'm talking about.

Any ideas?

[Stefan_Krueger]

This looks like a SdShowMsg window. Find that function in your InstallScript code.