Prevent screen refresh and flickering

To prevent screen refresh and flickering in an application it is often useful to lock the screen. This can occur with data aware controls which involve iteration and can make the application look strange to the user. I have found 2 solutions to this problem, the first is the one I use most of the time, but the second also works well. 

Solution 1


LockWindowUpdate(Handle);
try
    // Code goes here
finally
    LockWindowUpdate(0);
end;

Solution 2


SendMessage(Handle, WM_SETREDRAW, WPARAM(False), 0);
try
     // Code goes here
finally
    SendMessage(Handle, WM_SETREDRAW, WPARAM(True), 0);
    RedrawWindow(Self.Handle, nil, 0, RDW_ERASE or RDW_FRAME or RDW_INVALIDATE or RDW_ALLCHILDREN);
end;

These 2 solutions help with screen refresh, however there are other instances when these do not work, for example when using a gradient background.