MFC screenshot method

//get the current screen and save the pictureLRESULT cfeetscanview::saveviewbmp (WPARAM WPARAM, LPARAM LPARAM) {CRect rect;  This->getclientrect (&rect); Rect.left= -; Rect.top= the;    CBitmap M_bitmap; M_bitmap.m_hobject=Copyscreentobitmap (rect); CharSzfilename[_max_path]; CharSzpath[_max_path]; Getconfigmgr ()-getmoduledirectory (szpath); sprintf (szFileName,"%s\\image.png", szpath);    Savebitmaptofile (M_bitmap,szfilename); return 0;} Hbitmap Cfeetscanview::copyscreentobitmap (LPRECT LPRECT) {//screen and memory device description tableHDC hscrdc=0, HMEMDC; //Bitmap Handlehbitmap hbitmap, Holdbitmap; //selected area coordinates    intNX, NY, nX2, nY2; //bitmap width and height    intnwidth, nheight; //Screen Resolution    intXscrn, YSCRN; //Make sure the selected range is not empty rectangle//if (Isrectempty (lpRect))//return NULL; //Create a Device description table for the screenHSCRDC = CreateDC ("DISPLAY", NULL, NULL, NULL); //    intok=1; if(Hscrdc==null)//If creation fails{OK=0; }    //Create a compatible memory device description table for the Screen Device description tableHMEMDC =CreateCompatibleDC (HSCRDC); //get selected area coordinatesNX = lprect->Left ; NY= lprect->top; NX2= lprect->Right ; NY2= lprect->Bottom; //Get screen resolutionXSCRN =GetDeviceCaps (HSCRDC, horzres); YSCRN=GetDeviceCaps (HSCRDC, vertres); //Make sure the selected area is visible    if(NX <0) NX=0; if(NY <0) NY=0; if(NX2 >xscrn) nX2=Xscrn; if(NY2 >yscrn) nY2=Yscrn; Nwidth= NX2-NX; Nheight= NY2-NY; //Create a bitmap that is compatible with the Screen Device description tableHbitmap =CreateCompatibleBitmap (HSCRDC, nwidth, nheight); //Select the new bitmap in the Memory Device description tableHoldbitmap =(HBITMAP) SelectObject (HMEMDC, HBITMAP); //Copy the screen Device description table to the Memory Device description tableBitBlt (HMEMDC,0,0, nwidth, NHEIGHT,HSCRDC, NX, NY, srccopy); //get a handle to the screen bitmapHbitmap =(HBITMAP) SelectObject (HMEMDC, Holdbitmap); //ClearDeleteDC (HSCRDC);         DeleteDC (HMEMDC); //returns a bitmap handle    returnHbitmap;} BOOL Cfeetscanview::savebitmaptofile (hbitmap hbitmap, LPCTSTR lpfilename) {hdc hdc;//Device Description Table    intIbits;//the number of bytes per pixel at the current display resolutionWORD Wbitcount;//the number of bytes per pixel in the bitmapDWORD dwpalettesize=0,//Defines the size of the palette, the pixel byte size in the bitmap, the bitmap file size, the number of bytes written to the filedwbmbitssize, Dwdibsize, Dwwritten; BITMAP BITMAP; //Bitmap Property StructureBitmapfileheader Bmfhdr;//Bitmap file header structureBitmapinfoheader bi;//Bitmap Information Header structureLpbitmapinfoheader LPBI;//point to bitmap information header structureHANDLE FH, Hdib, Hpal,holdpal=null;//define file, allocate memory handle, palette handle//calculate the number of bytes per pixel in a bitmap fileHDC HWNDDC = CreateDC ("DISPLAY", Null,null,null); HDC=:: CreateCompatibleDC (HWNDDC); Ibits= GetDeviceCaps (HDC, Bitspixel) *GetDeviceCaps (HDC, PLANES);     DeleteDC (HDC); if(Ibits <=1) Wbitcount=1; Else if(Ibits <=4) Wbitcount=4; Else if(Ibits <=8) Wbitcount=8; Else if(Ibits <= -) Wbitcount= -; ElseWbitcount= - ; //Calculate palette Size    if(Wbitcount <=8) Dwpalettesize= (1<< wbitcount) *sizeof(Rgbquad); //set Bitmap information header structureGetObject (HBITMAP,sizeof(BITMAP), (LPSTR) &Bitmap); Bi.bisize=sizeof(Bitmapinfoheader); Bi.biwidth=Bitmap.bmwidth; Bi.biheight=Bitmap.bmheight; Bi.biplanes=1; Bi.bibitcount=Wbitcount; Bi.bicompression=Bi_rgb; Bi.bisizeimage=0; Bi.bixpelspermeter=0; Bi.biypelspermeter=0; Bi.biclrused=0; Bi.biclrimportant=0; Dwbmbitssize= ((Bitmap.bmwidth * wbitcount+ to)/ +) *4*Bitmap.bmheight; //allocating memory for bitmap contentHdib = GlobalAlloc (ghnd,dwbmbitssize+dwpalettesize+sizeof(Bitmapinfoheader)); LPBI=(Lpbitmapinfoheader) GlobalLock (HDIB); *LPBI =bi; //working with color palettesHPal =Getstockobject (Default_palette); if(hPal) {HDC=:: GetDC (NULL); Holdpal=:: SelectPalette (HDC, (Hpalette) HPal, FALSE);     RealizePalette (HDC); }     //gets the new pixel value under the paletteGetDIBits (HDC, Hbitmap,0, (UINT) Bitmap.bmheight, (LPSTR) LPBI+sizeof(Bitmapinfoheader)+dwpalettesize, (lpbitmapinfo) LPBI, dib_rgb_colors); //Restore Palette    if(Holdpal) {SelectPalette (HDC, (Hpalette) Holdpal, TRUE);         RealizePalette (HDC);     :: ReleaseDC (NULL, HDC); }     //Create a bitmap fileFH =CreateFile (lpFileName, Generic_write,0, NULL, Create_always, File_attribute_normal|File_flag_sequential_scan, NULL); if(FH = =Invalid_handle_value)returnFALSE; //Set Bitmap file headerBmfhdr.bftype =0x4d42;//"BM"Dwdibsize =sizeof(Bitmapfileheader)+sizeof(Bitmapinfoheader)+ Dwpalettesize +dwbmbitssize; Bmfhdr.bfsize=dwdibsize; Bmfhdr.bfreserved1=0; Bmfhdr.bfreserved2=0; Bmfhdr.bfoffbits= (DWORD)sizeof(Bitmapfileheader)+ (DWORD)sizeof(Bitmapinfoheader)+dwpalettesize; //write to bitmap file headerWriteFile (FH, (LPSTR) &AMP;BMFHDR,sizeof(Bitmapfileheader), &dwwritten, NULL); //write the remaining contents of the bitmap fileWriteFile (FH, (LPSTR) LPBI, Dwdibsize,&dwwritten, NULL); //ClearGlobalUnlock (HDIB);     GlobalFree (HDIB);     CloseHandle (FH); returnTRUE;}//90-degree display of the current picturecdc* pDC1 =M_left_pic.    GetDC (); Graphics Graph (pDC1-GETSAFEHDC ());    CRect rect; M_left_pic.    GetClientRect (rect); CharSzfilename[_max_path]; CharSzpath[_max_path]; Getconfigmgr ()-getmoduledirectory (szpath); sprintf (szFileName,"%s\\image.png", szpath);    WCHAR Wszwidestring[_max_path];    wcscpy (wszwidestring, CT2CW (szFileName));    Image Image (wszwidestring); REAL width=(REAL) image.    GetWidth (); REAL Height=(REAL) image.    GetHeight (); intNX =0; intNY =0; Point point90[]={point (NX+height,ny), point (NX+ height,ny+width), point (Nx,ny)}; Graph. DrawImage (&image, Point90,3); ReleaseDC (pDC1);

MFC Screen Methods