TestComplete samples (both built-in and additional) are located in the <Users>\Public\Public Documents\TestComplete 15 Samples folder.
Some file managers display the Public Documents folder as Documents.
User Forms samples demonstrate how you can work with user forms in your projects.
These samples are a part of the additional sample package. To use them, download this package from support.smartbear.com/testcomplete/downloads/samples and install it.
After the installation is over, you can find the samples in the <TestComplete 15 Samples>\Common\User Forms folder.
TestComplete project suites
<TestComplete 15 Samples>\Common\User Forms