WASTHEBEST

Solved the problem of endless flickering of transparent controls when the form first loads or is maximized. Couldn't find a solution anywhere on the NET after a strenuous search, so to give back for the countless times I have been helped by the online community, I'm sharing it here: It appears that sometimes when a transparent control paints itself, for some reason the display area of transparent controls in the lower z-order and the parent are invalidated, and an endless loop of WM_PAINT messages occurs. Override the WndProc function of the control. When the function receives the WM_PAINT message, call base.WndProc(ref m) and then call the ValidateRect Windows API as necessary, like so: [Yeah, I know example is in C#. Started programming with VB6; I don't care where the solution comes from.] [DllImport("user32", CharSet = CharSet.Auto, EntryPoint = "ValidateRect")] public extern static Boolean ValidateRectangle( IntPtr handle, // handle to window IntPtr nullPointer); //type changed from ref RECT private const Int32 WM_PAINT = 0x00f; protected override void WndProc(ref Message m) { if(m.Msg == WM_PAINT) { base.WndProc(ref m); ValidateRectangle(this.Parent.Handle, IntPtr.Zero); foreach(Control control in this.Parent.Controls) { Int32 i3 = this.Parent.Controls.IndexOf(this); Int32 i4 = this.Parent.Controls.IndexOf(control); if(control is TransparentControlD) { if(i4 > i3) { continue; } } ValidateRectangle(control.Handle, IntPtr.Zero); } } else { base.WndProc(ref m); } }