TextBox text becoming transparent when using Aero Blur in WinForms

Question

Recently I discovered how to get Aero Blur to work in borderless Forms across Windows Vista, 7 and 10. I am achieving this using the following function:

private void UpdateAeroBlur() {
    if (!SupportsAeroBlur) //do not do anything if XP or older
        return;
    else if (useSetWindowComposition) { //true if SetWindowCompositionAttribute function
                                        //exists in user32.dll
        AccentPolicy accent = new AccentPolicy();
        accent.AccentState = enableAeroBlur ? AccentState.ENABLE_BLURBEHIND : AccentState.DISABLED;
        WindowCompositionAttributeData data = new WindowCompositionAttributeData();
        data.Attribute = DwmWindowAttribute.ACCENT_POLICY;
        data.SizeOfData = AccentPolicy.Size;
        unsafe
        {
            data.Data = new IntPtr(&accent);
        }
        NativeApi.SetWindowCompositionAttribute(Handle, ref data);
    }
    DWM_BLURBEHIND style = new DWM_BLURBEHIND() {
        dwFlags = DWM_BB.Enable,
        fEnable = true
    };
    NativeApi.DwmEnableBlurBehindWindow(Handle, ref style);
}

And it manages to make the border of my custom Form translucent! However I am getting an annoying side-effect.

Look at this:

The text in the TextBox controls has become transparent, while the text on the buttons which are drawn using anti-aliased text GDI+ are not transparent.

I tried calling SetLayeredWindowAttributes and tried LWA_ALPHA with bAlpha = 255 and then tried LWA_COLORKEY with a COLORREF zeroed out, but the issue remained.

How do I make the text in TextBox controls opaque while leaving the border translucent?

Answer 1

change text foreColor This is the only way in my opinion