C / C++ / MFC

LONG lImageWidth = 640;//TransparentSrcBitmap.GetWidth();
LONG lImageHeight = 480;//TransparentSrcBitmap.GetHeight();
WORD wBitsPerPixel = 32;
 
//LONG lBytesPerRow = (((lImageWidth * (long)wBitsPerPixel + 31L) & (~31L)) / 8L);
LONG lBytesPerRow = 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 = lBytesPerRow * lImageHeight;
//bmi.bmiHeader.biXPelsPerMeter = 0;
//bmi.bmiHeader.biYPelsPerMeter = 0;
//bmi.bmiHeader.biClrUsed = 0;
//bmi.bmiHeader.biClrImportant = 0;

HDC hdc = ::CreateCompatibleDC(0);

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

if (hBitmap)
{   
    <font color="Green">// Clear the pixels in the DIBsection to a shade of blue, setting alpha channel to 50% blend</font>
    RGBQUAD *pCurPixel = (RGBQUAD *)pBitmapBits;
    int PixelCount = lImageWidth * lImageHeight;
    while (PixelCount > 0)
    {
        (*pCurPixel).rgbRed =      0x00;
        (*pCurPixel).rgbGreen =    0x00;
        (*pCurPixel).rgbBlue =     0xA0;
        (*pCurPixel).rgbReserved = 0x80; <font color="Green">// alpha channel value</font>
        pCurPixel++;
        PixelCount--;
    }

    HGDIOBJ hOldBitmap = ::SelectObject(hdc, 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,
                        hdc, 0, 0, lImageWidth, lImageHeight, bf);

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

::DeleteDC(hdc);

Mark Salsbery
Microsoft MVP - Visual C++

abupriabi@yahoo.com wrote:

control (like a progress bar) to display the signal strength on inputting a value in a range. Please let me know if you know if this is available or a way to implement this using VC++.

abupriabi@yahoo.com wrote:

I am looking to see if microsoft provides me an ActiveX control (like a progress bar) to display the signal strength on inputting a value in a range.

CPallini wrote:

Why do you need an ActiveX control for the above?
Don't you like the standard progress bar control?

Iain Clarke wrote:

If you want the top and bottom to be the opposite numbers, try setting the range with opposite numbers too.

SendDlgItemMessage (IDC_SEGMENTEDGECORRSPIN, UDM_SETRANGE, 0, MAKELONG((short)20, (short)-20));

SendDlgItem (hDlg, IDC_zzzzz, TBM_SETPOS, TRUE, (LPARAM)(1000-nPos));

pabloraul wrote:

NAMESPACE_BEGIN

pabloraul wrote:

i mean the project is in my solution why it wont recognize it?