Why Does My Statically Built Qt 5 Application Fail to Load the \'Windows\' Platform Plugin?

Failed to Load Platform Plugin "Windows" in Qt5 Static Build

When attempting to run a Qt application built statically with Qt 5.0.2 on Windows using Visual Studio 2012, users may encounter an error message indicating "Failed to load platform plugin windows."

Adding Required Libraries

To resolve this error, the following libraries should be added to the linker input:

• imm32.lib
• winmm.lib
• Ws2_32.lib
• qtmaind.lib
• Qt5Cored.lib
• Qt5Guid.lib
• Qt5Widgetsd.lib

However, adding "qwindowsd.lib" to this list does not typically address the issue.

Dynamic Build Solution

For dynamic builds only, users should ensure that the qwindows.dll file is moved to the directory containing the executable (.exe) and other necessary DLLs. It should be placed alongside, not within any subdirectories.

yourapp.exe
Qt5Core.dll
…
platforms/qwindows.dll
…

Note that the plugins directory is no longer necessary in this case. Instead, all the needed folders from QT_BASE/.../plugins/* should be directly included together with the binaries.

This solution has been successfully implemented by users and can be found in the Qt forums: http://qt-project.org/forums/viewthread/27056/#122588

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