C# Form.TransparencyKey working different for different colors, why?

by

I’ve heard of this problem before but never realized it was related to the TransparencyKey choice. Nice find. It is almost certainly caused by Aero. With it disabled, the effect is implemented by use of a hardware overlay in the video adapter. With it enabled, the desktop window compositing feature implements it. You can typically tell by a very brief flash of the transparency color before DWM catches up and replaces the area with the pixels from the windows in the background. Turning DWM off for your window might fix the problem but you’ll also lose the glass effects.

I can see little rhyme or reason to the color value, looks pretty random to me. Hard to call this anything else than a bug. I never ran into this before myself, I always use the same transparency key. Color.Fuchsia, an excellent fuchsed-up color. Recommended.

More Related Contents:

  1. How can I get the WebBrowser control to show modern contents?
  2. How do I get output from a command to appear in a control on a Form in real-time?
  3. How to write WinForms code that auto-scales to system font and dpi settings?
  4. How to make a window always stay on top in .Net?
  5. How do I call paint event?
  6. Transparent background image for Form – Smooth edge shape for the Form
  7. How do I use OpenFileDialog to select a folder?
  8. Refresh DataGridView when updating data source
  9. How to find overlapping controls that I added to form?
  10. Model-View-Presenter in WinForms
  11. InvalidOperationException – object is currently in use elsewhere
  12. Button inside a WinForms textbox
  13. Blocking dialogs in .NET WebBrowser control
  14. WinForms application hang due to SystemEvents.OnUserPreferenceChanged event
  15. How can user resize control at runtime in winforms
  16. How can I display a loading control while a process is waiting for be finished?
  17. How do you resize a form to fit its content automatically?
  18. Does the System.Windows.Forms.Timer run on a different thread than the UI?
  19. How to prevent flickering in ListView when updating a single ListViewItem’s text?
  20. Make portion of a Label’s Text to be styled bold
  21. .NET / Windows Forms: remember windows size and location
  22. Why is my bound DataGridView throwing an “Operation not valid because it results in a reentrant call to the SetCurrentCellAddressCore function” error?
  23. Create custom shape for button
  24. Auto-width of ComboBox’s content
  25. How can I detect when Windows 10 enters tablet mode in a Windows Forms application?
  26. How to get the screenshot of the form
  27. How to catch a key press on a C# .NET form
  28. RichTextBox Newline Conversion?
  29. How to get DPI in C# .NET?
  30. Winform form closed event

Leave a Comment