Printing EULA from Wix3.0 and later
1) When you compile your wix source code, the light.exe must reference the WixUIExtension.dll in command line. Use the command line switch -ext for this.
2) If when you add the reference to the WixUIExtension.dll, your project fails to compile, this is most likely because of clashes of Dialog IDs, i.e. your project was using the same IDs of dialogs as some standard dialogs in WixUIExtension.dll, give different IDs to your dialogs. This is quite common problem.
3) Your license dialog must have ScrollableText control with the id "LicenseText". Wix searches for exactly this name of control when it prints.
and a PushButton which refers to the custom action
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4) Define CustomAction with the Id="PrintEula" like this:
Note: BinaryKey is different in Wix3.0 comparing to Wix2.0 and must be exactly "WixUIWixca" (case sensitive).
When user presses the button he/she will be presented with the standard Select Printer Dialog and will be able to print from there.
