I have a QtCreator project file *.pro
How to convert it to Visual Studio 2008 project *.sln?
You can also use the qmake command to do this. Go to the project dir and type "qmake -tp vc".
Qt Creator / qmake can generate .vcproj files directly.
See this link
Put "TEMPLATE=vcapp" or "TEMPLATE=vclib" (as appropriate) in your .pro file and run qmake. That will generate a .vcproj file.
Edit: The link no longer worke, but I found an archive of it here
It's now possible to open the .pro file directly from the Qt Visual Studio Tools extension. Visual Studio will then generate the necessary solution files. Currently the extension is available for VS2013, VS2015, VS2017 and VS2019.
Step 1. Install the QT Visual Studio Extension. From the Marketplace, install the Qt Visual Studio Tools extension.
Step 2. Import your .pro projects into Visual Studio. To do that, select the Qt VS Tools > Open Qt Project File (.pro) to let the extension create a VS solution and project from your existing Qt .pro file. More information on this is available in the Qt docs covering Qt project management in Visual Studio.
Answer copied from this blog post: Bring your existing Qt projects to Visual Studio.