mdi - C# glass on an mdiparent -

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I'm trying to use the DwmExtendFrameIntoClientArea method on an mdiparent. 

  IsMdiContainer = true;

Although the glass does not present correctly, is it a limit of a limit that I can get around? If the form is not set as an mdicontainer, then the glass completely renders the glass area white instead of glass.


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