C / C++ / MFC

Mike Doner wrote:

Is there a windows call I can use that will tell me if the current process is running as a windows service

class MyClass;
 
typedef void (MyClass::*FNPTR)( void );
 
CTypedPtrArray<CPtrArray, FNPTR> arr;

danginkgo wrote:

I tried using AlphaBlend() but it doesn't work.

<br />
BLENDFUNCTION blendF;        <br />
blendF.BlendOp             = AC_SRC_OVER;  <br />
blendF.BlendFlags          = 0;                                         <br />
blendF.SourceConstantAlpha = 255;                                         <br />
blendF.AlphaFormat         = AC_SRC_ALPHA; <br />

danginkgo wrote:

When I display the image using AlphaBlend() function the image looks the same as when I displayed it using BitBlt().

danginkgo wrote:

Is it posible using this function?

LONG lImageWidth = 640;
LONG lImageHeight = 480;
WORD wBitsPerPixel = 32;
 
LONG lStride = lImageWidth * 4;
 
BYTE* pBitmapBits;
 
BITMAPINFO bmi;
memset(&bmi, 0, sizeof(BITMAPINFO));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = lImageWidth;
bmi.bmiHeader.biHeight = lImageHeight;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = wBitsPerPixel;
bmi.bmiHeader.biCompression = BI_RGB;
bmi.bmiHeader.biSizeImage = lStride * lImageHeight;
//bmi.bmiHeader.biXPelsPerMeter = 0;
//bmi.bmiHeader.biYPelsPerMeter = 0;
//bmi.bmiHeader.biClrUsed = 0;
//bmi.bmiHeader.biClrImportant = 0;

HDC hdcMem = ::CreateCompatibleDC(0);

HBITMAP hBitmap = ::CreateDIBSection(hdcMem, &bmi, DIB_RGB_COLORS, (void**)&pBitmapBits, NULL, 0);

if (hBitmap)
{   
	memset(pBitmapBits, 0, bmi.bmiHeader.biSizeImage);
	RGBQUAD *pCurPixel = (RGBQUAD *)pBitmapBits;
	int PixelCount = lImageWidth * lImageHeight;
	while (PixelCount > 0)
	{
		(*pCurPixel).rgbRed =      0x00;
		(*pCurPixel).rgbGreen =    0x00;
		(*pCurPixel).rgbBlue =     0xA0;
		(*pCurPixel).rgbReserved = 0x80;
		pCurPixel++;
		PixelCount--;
	}

	HGDIOBJ hOldBitmap = ::SelectObject(hdcMem, hBitmap);

	HDC hClientDC = ::GetDC(*this);

	HPEN hPen = ::CreatePen(PS_SOLID, 10, RGB(255,0,128));
	HGDIOBJ hOldPen = ::SelectObject(hClientDC, hPen);
	::MoveToEx(hClientDC, 0, 0, NULL);
	::LineTo(hClientDC, 650, 490);
	::SelectObject(hClientDC, hOldPen);
	::DeleteObject(hPen);

	BLENDFUNCTION bf;
	bf.BlendOp = AC_SRC_OVER;
	bf.BlendFlags = 0;
	bf.SourceConstantAlpha = 0xFF;
	bf.AlphaFormat = AC_SRC_ALPHA;

	::AlphaBlend(hClientDC, 0, 0, lImageWidth, lImageHeight,
						hdcMem, 0, 0, lImageWidth, lImageHeight, bf);

	::ReleaseDC(*this, hClientDC);
	::SelectObject(hdcMem, hOldBitmap);
	::DeleteObject(hBitmap);
}

::DeleteDC(hdcMem);