WinformHost面板内的WPF窗口

Question

I am showing a WPF exe window inside another WPF application using winform host.

I have created a panel in main application and set it as child of winformhost.

  mHostingPanel = new System.Windows.Forms.Panel()
            {
                BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
            };                


            mWinformHost = new WindowsFormsHost();
            mWinformHost.Child = mHostingPanel;

and then I start the other window process and set hosting panel as parent.

  WindowsAPI.SetParent(mProcess.MainWindowHandle, mHostingPanel.Handle);

My question is if I launch the application,Who will be rendering my Child WPF window whose parent is a winform panel.Will it be Direct-X or GDI context of Panel?

Also if I set Allowtransparency=True on child WPF application,The UI doesnt show up in hosting panel.

Answer 1

Found the reason.Its called airspace issue (when win32 and WPF trying to share pixels) and I dont think it can be solved by any framework API as microsoft denied it. https://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/2644120-bring-back-the-hwndhost-isredirected-and-compositi

Mitigating AirSpace issues