C / C++ / MFC

case WM_LBUTTONDOWN:

 if(//checkcurosorlocationforcorner)
 {
   SetCapture(hWnd);
   mResize = TRUE;
 }
break;
case WM_LBUTTONUP:
{
   ReleaseCapture();
   mResize = FALSE;
}
break;

case WM_MOUSEMOVE:
{
  if(wParam == MK_LBUTTON) && mResize)
  {
     	RECT rcWnd;
	POINT pnt, pntDiff;
	GetCursorPos(&pnt);
	GetWindowRect(hWnd, &rcWnd);
        
        DeleteObject(hRegion2);
	DeleteObject(hRegion1); 

        pntDiff.x = pnt.x - rcWnd.right;
	nWidth = nWidth + (int)pntDiff.x;
        pntDiff.y = pnt.y - rcWnd.bottom;
	nHeight = nHeight + (int)pntDiff.y;
	
        MoveWindow(hWnd,rcWnd.left, rcWnd.top, nWidth, nHeight, TRUE);

	HRGN hRegion1 = CreateRectRgn(0, 0, nWidth, nHeight);
	HRGN hRegion2 = CreateRectRgn(0, 0, nWidth, nHeight);
	CombineRgn(hRegion1, hRegion1, hRegion2, RGN_OR);
	SetWindowRgn(hWnd, hRegion1, true);
				
	UpdateWindow(hWnd);
   }
}
break;

<code>POINT AnchorPoint;</code>

...

case WM_LBUTTONDOWN:

 if(//checkcurosorlocationforcorner)
 {
   SetCapture(hWnd);
   mResize = TRUE;
   <code>::GetCursorPos(&AnchorPoint);</code>
 }
break;
case WM_LBUTTONUP:
{
   <code>if (mResize)
   {</code>
      ReleaseCapture();
      mResize = FALSE;
   <code>}</code>
}
break;
case WM_MOUSEMOVE:
{
  if(wParam == MK_LBUTTON) && mResize)
  {
     <code>POINT newPoint;
     ::GetCursorPos(&newPoint);
     if (newPoint.x != AnchorPoint.x || newPoint.y != AnchorPoint.y)
     {
        RECT rcWnd;
        ::GetWindowRect(hWnd, &rcWnd);
        rcWnd.right += (newPoint.x - AnchorPoint.x);
        rcWnd.bottom += (newPoint.y - AnchorPoint.y); 
        ::MoveWindow(hWnd, rcWnd.left, rcWnd.top, rcWnd.right-rcWnd.left, rcWnd.bottom-rcWnd.top, TRUE);
        AnchorPoint = newPoint;
     }</code>
   }
}
break;

Mark Salsbery
Microsoft MVP - Visual C++

#define LWA_COLORKEY            0x00000001
#define LWA_ALPHA               0x00000002
#define g_ColourKey             0xFF00FF // 255,0,255(pink) in hex RGB
#define WS_EX_LAYERED			0x00080000
#define IDB_CLOSEWINDOW 1000

typedef BOOL (WINAPI *lpfnSetLayeredWindowAttributes)(HWND hWnd, COLORREF crKey, BYTE bAlpha, DWORD dwFlags);
lpfnSetLayeredWindowAttributes SetLayeredWindowAttributes;

int nWidth = 506;
int nHeight = 376;
BOOL mDown = FALSE;
POINT AnchorPoint;

LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	DWORD dwStyle = GetWindowLong(hWnd, GWL_STYLE);
        HRGN hRegion1 = CreateRectRgn(0, 0, nWidth, nHeight);//-----1
	HRGN hRegion2 = CreateRectRgn(0, 0, nWidth, nHeight);//-----1

	switch(Msg)
	{
	case WM_CREATE:


		g_Hwnd = hWnd;
		// Remove title bar and prevent resizing
		dwStyle &= ~(WS_CAPTION|WS_SIZEBOX);
		SetWindowLong(hWnd, GWL_STYLE, dwStyle);
		
		CombineRgn(hRegion1, hRegion1, hRegion2, RGN_OR);//-----1
		SetWindowRgn(hWnd, hRegion1, true);//-----1
		
		SetWindowLong(hWnd, GWL_EXSTYLE, GetWindowLong(hWnd, GWL_EXSTYLE) | WS_EX_LAYERED);
                SetLayeredWindowAttributes(hWnd, g_ColourKey, 0, LWA_COLORKEY);

		m_hCloseButton = CreateWindow("BUTTON",
						"x",
						WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON | BS_CENTER | BS_FLAT,
						nWidth-28, (nHeight-nHeight+10), 20, 20,
						hWnd,
						(HMENU)IDB_CLOSEWINDOW,
						hInst,
						NULL);

BOOL Skin() {

	// load the skin bitmap from resource
	HBITMAP hSkinBmp = LoadBitmap(hInst,MAKEINTRESOURCE(IDB_MAIN));
	if (!hSkinBmp) return -1;

	// create a device context for the skin
	HDC dcSkin = CreateCompatibleDC(0);

	// select the skin bitmap
	HBITMAP hOldBmp = (HBITMAP)SelectObject(dcSkin, hSkinBmp);

	PAINTSTRUCT ps;
	BeginPaint(g_Hwnd,&ps);

	BitBlt(ps.hdc, 0, 0, nWidth, nHeight, dcSkin, 0,0, SRCCOPY);

	EndPaint(g_Hwnd,&ps);
	return 0;
}

Sarriss wrote:

and also given that i have two levels at the top pic couldnt i just have a bigger corner piece in the corner and then have the otherone plus the pink bit that isnt showing.

enhzflep wrote:

In your case, it'll be not quite that simple since the bar across the top of the window isn't of uniform height. You may need 5 images to cover the top - the two corners, the low part, the high part and the transition between the two.

case WM_LBUTTONDOWN:

 if(//checkcurosorlocationforcorner)
 {
   SetCapture(hWnd);
   mResize = TRUE;
 }
break;
case WM_LBUTTONUP:
{
   <code>if (mResize)
   {</code>
      ReleaseCapture();
      mResize = FALSE;
   <code>}</code>
}
break;

Mark Salsbery
Microsoft MVP - Visual C++

// If you seek easy and blind casting.
m_strOutText += (TCHAR)nChar;

// If you respect C++ casting styles.
m_strOutText += static_cast<tchar>( nChar );</tchar>

FR2ESOD wrote:

// error C2593: 'operator +=' is ambiguous //