Resolving Compiler warnings C4311 and C4312

[Anarchi]

Can someone please help me resolve this warnings? Ive fixed many of the others, its just these ones that I'm stuck at.

I'm using Visual Studio 2005 Standard w/SP1. MFC Dialog App (non-unicode)


warning C4311: 'type cast' : pointer truncation from 'HICON' to 'int'
warning C4312: 'type cast' : conversion from 'unsigned long' to 'HICON' of greater

    #define	BTNST_AUTO_GRAY					(HICON)(0xffffffff - 1L)
    // Set icon when the mouse is IN the button
	hIconIn = (HICON)::LoadImage(hInstResource, MAKEINTRESOURCE(nIconIn), IMAGE_ICON, nCxDesiredIn, nCyDesiredIn, 0);


	switch ((int)hIconIn) // C4311
	{
		case NULL:
			break;
		case (int)BTNST_AUTO_GRAY: // C4312
			hIconOut = BTNST_AUTO_GRAY;
			break;
		case (int)BTNST_AUTO_DARKER:
			hIconOut = BTNST_AUTO_DARKER;
			break;
		default:
			hIconOut = (HICON)::LoadImage(hInstResource, MAKEINTRESOURCE(nIconOut), IMAGE_ICON, nCxDesiredOut, nCyDesiredOut, 0);
			break;
	} // switch

C4311: 'type cast' : pointer truncation from 'LRESULT (__stdcall *)(HWND,UINT,WPARAM,LPARAM)' to 'DWORD'
C4312: 'type cast' : conversion from 'LONG' to 'WNDPROC' of greater size

WNDPROC oldWindowProc;
oldWindowProc = (WNDPROC)::SetWindowLong(GetParent()->m_hWnd, GWL_WNDPROC, (DWORD)SubclassWindowProc); // C4311 and 4312