# VS_STARTUP_PROJECT

New in version 3.6.

Specify the default startup project in a Visual Studio solution.

The Visual Studio Generators create a `.sln` file for each directory whose `CMakeLists.txt` file calls the `project()` command. Set this property in the same directory as a `project()` command call (e.g. in the top-level `CMakeLists.txt` file) to specify the default startup project for the corresponding solution file.

The property must be set to the name of an existing target. This will cause that project to be listed first in the generated solution file causing Visual Studio to make it the startup project if the solution has never been opened before.

If this property is not specified, then the `ALL_BUILD` project will be the default.