How to display an image in full screen borderless window in openCV

I want to display an image in OpenCV in a full screen borderless window. In other words, only the image pixels will appear, without menu, toolbar, or window background.

Using imshow() or cvShowImage() don't enable it:

1. The window grows to be full screen in width but not in height. It misses few pixels.
2. I could not make it borderless even by changing settings of window handler.

I think that the problem is rooted in cvNamedWindow() method which creates main WS_OVERLAPPED window, then creates a child and all functions like imshow() or cvGetWindowHandle() operate on the child.

Thus even windows command:

SetWindowLong((HWND)cvGetWindowHandle(winName), GWL_STYLE, WS_VISIBLE | WS_EX_TOPMOST | WS_POPUP);

Doesnt help, since the child cannot become borderless WS_POPUP. Someone got a workaround?

• Maybe, showing opencv mat to window without using opencv built in methods
• Or some kind of windows trick

P.S. I tried the following code:

cvMoveWindow("AAA",0,0);
cvSetWindowProperty("AAA", CV_WINDOW_FULLSCREEN, CV_WINDOW_FULLSCREEN);

// Also I tried this:
HWND hwnd = (HWND)cvGetWindowHandle("AAA");
RECT windowRect;
windowRect.left = 0;
windowRect.top = 0;
windowRect.right = cxScreen; //Display resolution
windowRect.bottom = cyScreen; //Display resolution
AdjustWindowRect(&windowRect,WS_VISIBLE,false);
long p_OldWindowStyle = SetWindowLongPtr(hwnd,GWL_STYLE,WS_POPUP);
SetWindowPos(hwnd,HWND_TOP,0,0,windowRect.right,windowRect.bottom,SWP_FRAMECHANGED | SWP_SHOWWINDOW);
SetWindowLong(hwnd, GWL_STYLE, WS_VISIBLE | WS_EX_TOPMOST | WS_POPUP);