Disable "x" button?

[QM_Expert]

How can I disable the "x" close button from a window? This will be on a window that is already created! Is it possible? Anyway to disable the "x"?

Tried finding a style to set in msdn and use SetWinStyle but can't seem to find anything.
Found this C++ code, can you convert?

Macro Macro2

Code:

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HMENU hMenuHandle;
long lngItemCount;
int c, style;

hMenuHandle = GetSystemMenu(hWnd, false);
lngItemCount = GetMenuItemCount(hMenuHandle);

style = GetWindowLong(hWnd, GWL_STYLE);
style &= ~WS_MAXIMIZEBOX;
SetWindowLong(hWnd, GWL_STYLE, style);

c = lngItemCount;
while(c > lngItemCount - 4)
RemoveMenu(hMenuHandle, c--, MF_BYPOSITION | MF_DISABLED);

DrawMenuBar(hWnd);;As you can see this code will go in your window procedure under WM_CREATE. Just as a reminder, some systems have things added to the "standard" system menu so you will need to find a way of allowing for that.