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# IDC - The Interface Description Compiler (ActiveQt)

The IDC tool is part of the ActiveQt build system and makes it possible to turn any Qt binary into a full COM object server with only a few lines of code.

IDC understands the following command line parameters:

Option | Result
--- | ---
dll -idl idl -version x.y | Writes the IDL of the server dll to the file idl. The type library wll have version x.y.
dll -tlb tlb | Replaces the type library in dll with tlb
-v | Print version information
-regserver dll | Register the COM server dll
-unregserver | Unregister the COM server dll

It is usually never necessary to invoke IDC manually, as the `qmake` build system takes care of adding the required post processing steps to the build process. See the ActiveQt documentation for details.