C / C++ / MFC

• http://www.codeproject.com/miscctrl/progressctrlx.asp
  
• http://www.codeguru.com/controls/EZSnakeCtrl.shtml
  

//This code should go inside of your WM_PAINT, or OnPaint handler.
PAINTSTRUCT ps;
HDC hdc;

//C: Get the Device context to paint the bitmap onto your window.
//   hWnd is the handle to the window that you want to paint on.
hdc = ::BeginPaint(hWnd, &ps);
//C: Load the bitmap from your resources.
HBITMAP hBitmap;
::LoadImage(::GetModuleHandle(NULL),          // Can use a global hInstance handle if you have cached one.
            MAKEINTRESOURCE(IDB_RESOURCEID),  // The resource ID of your bitmap.
            IMAGE_BITMAP,                     // You can load cursors and icons as well.
            0,                                // The desired width and height of the bitmap
            0,                                //   0, indicates that you want the default.
            LR_DEFAULTSIZE                    // Flags that determine how the image is loaded.
           );
//C: Check that the bitmap loaded successfully.
if (!hBitmap)
{
//C: The bitmap did not load successfully, perform error handling here.
}

//C: Create a memory device context to load the bitmap into.
HDC memDC;
memDC = ::CreateCompatibleDC(hdc);
//C: Select the resource bitmap into the memory DC, while saving the old bitmap.
HBITMAP hBmpOld;
hBmpOld = (HBITMAP)::SelectObject(memDC, hBitmap);
//C: Get the dimensions of your bitmap.
BITMAP bm;
::GetObject(hBitmap, sizeof(BITMAP), &bm);
//C: Now the bitmap can be painted onto your target window.
//   The bitmap will be painted at 0,0 on the target windows client area, 
//   and it will be its default size.
if (FALSE == ::BitBlt(hdc, 0,0, bm.bmWidth, bm.bmHeight, memDC, 0,0, SRCCOPY))
{
//C: If code reaches this point, the Blt, or paint, did not succeed.

}

//C: Set your memory DC back to its original state.
::SelectObject(memDC, hBmpOld);
//C: Now you can destroy the memory DC and the bitmap that you loaded.
::DeleteDC(memDC);
::DeleteObject(hBitmap);

//C: Now, destroy the painting DC that you created for your paint handler.
::EndPaint(hWnd, &ps);

PAINTSTRUCT ps;
hdc = ::BeginPaint(hWnd, &ps);

...

::EndPaint(hWnd, &ps);

hdc = ::GetDC(hWnd);
...
::ReleaseDC(hWnd, hdc);

HRESULT SomeFunction([in] VARIANT avtLabel, [in] VARIANT *apvtTimes);

COleVariant   vvtLabel(_T("My STring"));
COleVariant   vvtInt(1000, VT_I4);
HRESULT       vhRet;

vhRet = SomeFunction(vvtLabel.Detach(), vvtInt);
<pre>

Hope this helps.

 

------------------------
Derek Waters
derek@lj-oz.com