Thanks for the 'hint' hskoglund. I am not using the Qt system to do my builds (.pro, .pri, cmake) I am using Visual Studio 2017. So I added Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin); to my main(). I then needed to add additional libraries to my linkage. My linkage now looks like this: C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\Qt5Core.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\Qt5Gui.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\Qt5Widgets.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\qtmain.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\qtpcre2.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\qtharfbuzz.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\qtlibpng.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\qtfreetype.lib c:\Source\Qt\Qt5111\Qt5WinExtrasx64.lib (I modified qt5winextras, does not relate though) C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\plugins\platforms\qwindows.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\Qt5FontDatabaseSupport.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\Qt5EventDispatcherSupport.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\Qt5ThemeSupport.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\Qt5WindowsUIAutomationSupport.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\libEGL.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\libGLESv2.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\preprocessor.lib C:\Source\Qt\Qt5.11.1\5.11.1\Src\qtbase\lib\translator.lib ws2_32.lib Mincore.lib Winmm.lib Dwmapi.lib Imm32.lib d3d9.lib dxguid.lib My static linked application is quite large (12.38MB) compared to the same application written utilizing Win32 (398KB). At least it is not as large as the 'Shared' deployment which is 89.4MB. Thanks all.