vf中打印命令

*先预览，如果按打印按钮，会d出打印对话框，你可以选择打印机或设置打印机及起始页、终止页及份数或纸张类型。

Report Form 报表 Noconsole To Printer Prompt Preview

*先预览，按打印按钮后直接打印。

Report Form 报表 Noconsole To Printer Preview

*打印对话框，你可以选择打印机或设置打印机及起始页、终止页及份数，然后直接打印。

Report Form 报表 Noconsole To Printer Prompt

VFP中将表单的内容直接打印

*-- 程序名称：将表单的内容直接打印 --*

*-- 将窗口中的内容以一个位图的形式打印 --*

*-- 程序作者：未知，来源论坛转帖 --*

*-- 使用方法：在表单中执行该程序既可 --*

* 例：在某表单的一个command --*

* 按纽中执行 do PrintForm.prg --*

*-- 定义常量

#DEFINE LOGPIXELSX 88

#DEFINE LOGPIXELSY 90

#DEFINE PHYSICALOFFSETX 112

#DEFINE PHYSICALOFFSETY 113

#DEFINE SRCCOPY 13369376

#DEFINE DIB_RGB_COLORS 0

*-- 调用本程序段中的子过程

DO decl

*-- 定义变量

PRIVATE pnWidth, pnHeight, lnBitsPerPixel, lnBytesPerScan

STORE 0 TO pnWidth, pnHeight, lnBitsPerPixel, lnBytesPerScan

LOCAL hwnd, hFormDC, hPrnDC, hMemDC, hMemBmp, hSavedBitmap,

xOffsPrn, yOffsPrn, xScale, yScale, lcDocInfo, lcBInfo, lpBitsArray

*-- 得到打印机设备的坐标偏移量

hPrnDC = getDefaultPrnDC() &&没有进行错误检查

xOffsPrn = GetDeviceCaps(hPrnDC, PHYSICALOFFSETX)

yOffsPrn = GetDeviceCaps(hPrnDC, PHYSICALOFFSETY)

*-- 得到屏幕的窗口句柄，及她们的宽度、高度等。

hwnd = GetFocus() &&a window with keyboard focus

hFormDC = GetWindowDC(hwnd)

= getWinRect (hwnd, @pnWidth, @pnHeight)

*-- 根据屏幕和打印机得到缩放值

xScale = GetDeviceCaps(hPrnDC, LOGPIXELSX)/GetDeviceCaps(hFormDC,LOGPIXELSX)

yScale = GetDeviceCaps(hPrnDC, LOGPIXELSY)/GetDeviceCaps(hFormDC,LOGPIXELSY)

*-- 将屏幕的内容创建为位图图象数据

hMemDC = CreateCompatibleDC (hFormDC)

hMemBmp = CreateCompatibleBitmap (hFormDC, pnWidth, pnHeight)

hSavedBitmap = SelectObject(hMemDC, hMemBmp)

*-- 将位图数据从屏幕拷贝到虚拟设备上

= BitBlt (hMemDC, 0,0, pnWidth,pnHeight, hFormDC, 0,0, SRCCOPY)

= SelectObject(hMemDC, hSavedBitmap)

* retrieving bits from the compatible bitmap into a buffer

* as a device-independent bitmap (DIB) with a BitsPerPixel value

* as one of the printer device context

lcBInfo = InitBitmapInfo(hPrnDC)

lpBitsArray = InitBitsArray()

= GetDIBits (hMemDC, hMemBmp, 0, pnHeight,

lpBitsArray, @lcBInfo, DIB_RGB_COLORS)

lcDocInfo = Chr(20) + Repli(Chr(0), 19) &&DOCINFO struct - 20 bytes

IF StartDoc(hPrnDC, @lcDocInfo) >0

= StartPage(hPrnDC)

= StretchDIBits (hPrnDC, xOffsPrn, yOffsPrn,

xOffsPrn + Int(xScale * pnWidth),

yOffsPrn + Int(yScale * pnHeight),

0,0, pnWidth, pnHeight,

lpBitsArray, @lcBInfo, DIB_RGB_COLORS, SRCCOPY)

= EndPage(hPrnDC)

= EndDoc(hPrnDC)

ENDIF

*-- 退出时释放系统资源

= GlobalFree(lpBitsArray)

= DeleteObject(hMemBmp)

= DeleteDC(hMemDC)

= DeleteDC(hPrnDC)

= ReleaseDC(hwnd, hFormDC)

RETURN

PROCEDURE getWinRect (lnHwnd, lnWidth, lnHeight)

*-- 返回指定句柄的窗口的宽和高

#DEFINE maxDword 4294967295 &&0xffffffff

LOCAL lpRect, lnLeft, lnTop, lnRight, lnBottom

lpRect = REPLI (Chr(0), 16)

= GetWindowRect (lnHwnd, @lpRect)

lnRight = buf2dword(SUBSTR(lpRect, 9,4))

lnBottom = buf2dword(SUBSTR(lpRect, 13,4))

lnLeft = buf2dword(SUBSTR(lpRect, 1,4))

IF lnLeft >lnRight

lnLeft = lnLeft - maxDword

ENDIF

lnTop = buf2dword(SUBSTR(lpRect, 5,4))

IF lnTop >lnBottom

lnTop = lnTop - maxDword

ENDIF

lnWidth = lnRight - lnLeft

lnHeight = lnBottom - lnTop

RETURN

FUNCTION getDefaultPrnDC

* returns device context for the default printer

#DEFINE PD_RETURNDC 256

#DEFINE PD_RETURNDEFAULT 1024

LOCAL lcStruct, lnFlags

lnFlags = PD_RETURNDEFAULT + PD_RETURNDC

* fill PRINTDLG structure

lcStruct = num2dword(66) + Repli(Chr(0), 16) +

num2dword(lnFlags) + Repli(Chr(0), 42)

IF PrintDlg (@lcStruct) <>0

RETURN buf2dword (SUBSTR(lcStruct, 17,4))

ENDIF

RETURN 0

FUNCTION InitBitmapInfo(hTargetDC)

#DEFINE BI_RGB 0

#DEFINE RGBQUAD_SIZE 4 &&RGBQUAD

#DEFINE BHDR_SIZE 40 &&BITMAPINFOHEADER

LOCAL lnRgbQuadSize, lcRgbQuad, lcBIHdr

* use printer BitPerPixel value

lnBitsPerPixel = 24

* initializing BitmapInfoHeader structure

lcBIHdr = num2dword(BHDR_SIZE) +

num2dword(pnWidth) + num2dword(pnHeight) +

num2word(1) + num2word(lnBitsPerPixel) +

num2dword(BI_RGB) + Repli(Chr(0), 20)

* creating a buffer for the color table

IF lnBitsPerPixel <= 8

lnRgbQuadSize = (2^lnBitsPerPixel) * RGBQUAD_SIZE

lcRgbQuad = Repli(Chr(0), lnRgbQuadSize)

ELSE

lcRgbQuad = ""

ENDIF

RETURN lcBIHdr + lcRgbQuad

PROCEDURE InitBitsArray()

#DEFINE GMEM_FIXED 0

LOCAL lnPtr, lnAllocSize

* making sure the value is DWORD-aligned

lnBytesPerScan = Int((pnWidth * lnBitsPerPixel)/8)

IF Mod(lnBytesPerScan, 4) <>0

lnBytesPerScan = lnBytesPerScan + 4 - Mod(lnBytesPerScan, 4)

ENDIF

lnAllocSize = pnHeight * lnBytesPerScan

lnPtr = GlobalAlloc (GMEM_FIXED, lnAllocSize)

= ZeroMemory (lnPtr, lnAllocSize)

RETURN lnPtr

FUNCTION num2word (lnvalue)

RETURN Chr(MOD(m.lnvalue,256)) + CHR(INT(m.lnvalue/256))

FUNCTION num2dword (lnvalue)

#DEFINE m0 256

#DEFINE m1 65536

#DEFINE m2 16777216

LOCAL b0, b1, b2, b3

b3 = Int(lnvalue/m2)

b2 = Int((lnvalue - b3*m2)/m1)

b1 = Int((lnvalue - b3*m2 - b2*m1)/m0)

b0 = Mod(lnvalue, m0)

RETURN Chr(b0)+Chr(b1)+Chr(b2)+Chr(b3)

FUNCTION buf2word (lcBuffer)

RETURN Asc(SUBSTR(lcBuffer, 1,1)) +

Asc(SUBSTR(lcBuffer, 2,1)) * 256

FUNCTION buf2dword (lcBuffer)

RETURN Asc(SUBSTR(lcBuffer, 1,1)) +

Asc(SUBSTR(lcBuffer, 2,1)) * 256 +

Asc(SUBSTR(lcBuffer, 3,1)) * 65536 +

Asc(SUBSTR(lcBuffer, 4,1)) * 16777216

PROCEDURE decl &&so many of them declared here

DECLARE INTEGER GetFocus IN user32

DECLARE INTEGER EndDoc IN gdi32 INTEGER hdc

DECLARE INTEGER GetWindowDC IN user32 INTEGER hwnd

DECLARE INTEGER DeleteObject IN gdi32 INTEGER hObject

DECLARE INTEGER CreateCompatibleDC IN gdi32 INTEGER hdc

DECLARE INTEGER ReleaseDC IN user32 INTEGER hwnd, INTEGER hdc

DECLARE INTEGER GetWindowRect IN user32 INTEGER hwnd, STRING @lpRect

DECLARE INTEGER GlobalAlloc IN kernel32 INTEGER wFlags, INTEGER dwBytes

DECLARE INTEGER GetDeviceCaps IN gdi32 INTEGER hdc, INTEGER nIndex

DECLARE INTEGER SelectObject IN gdi32 INTEGER hdc, INTEGER hObject

DECLARE INTEGER StartDoc IN gdi32 INTEGER hdc, STRING @ lpdi

DECLARE INTEGER GlobalFree IN kernel32 INTEGER hMem

DECLARE INTEGER PrintDlg IN comdlg32 STRING @ lppd

DECLARE INTEGER DeleteDC IN gdi32 INTEGER hdc

DECLARE INTEGER StartPage IN gdi32 INTEGER hdc

DECLARE INTEGER EndPage IN gdi32 INTEGER hdc

DECLARE RtlZeroMemory IN kernel32 As ZeroMemory

INTEGER dest, INTEGER numBytes

DECLARE INTEGER CreateCompatibleBitmap IN gdi32

INTEGER hdc, INTEGER nWidth, INTEGER nHeight

DECLARE INTEGER BitBlt IN gdi32

INTEGER hDestDC, INTEGER x, INTEGER y,

INTEGER nWidth, INTEGER nHeight, INTEGER hSrcDC,

INTEGER xSrc, INTEGER ySrc, INTEGER dwRop

DECLARE INTEGER StretchDIBits IN gdi32

INTEGER hdc, INTEGER XDest, INTEGER YDest,

INTEGER nDestWidth, INTEGER nDestHeight, INTEGER XSrc,

INTEGER YSrc, INTEGER nSrcWidth, INTEGER nSrcHeight,

INTEGER lpBits, STRING @lpBitsInfo,

INTEGER iUsage, INTEGER dwRop

DECLARE INTEGER GetDIBits IN gdi32

INTEGER hdc, INTEGER hbmp, INTEGER uStartScan,

INTEGER cScanLines, INTEGER lpvBits, STRING @lpbi,

INTEGER uUsage

RETURN &&decl

▲可否控制表单中的打印区域？

●

可以。只需要调整下面代码的left、top、width、height就可以，比如下面代码打印整个表单

*-- 将位图数据从屏幕拷贝到虚拟设备上

= BitBlt (hMemDC, 0,0, pnWidth,pnHeight, hFormDC, 0,0, SRCCOPY)

= SelectObject(hMemDC, hSavedBitmap)

而下面代码只打印表单中间的一部分区域

*-- 将位图数据从屏幕拷贝到虚拟设备上

= BitBlt (hMemDC, -30,-30, pnWidth+60,pnHeight+60, hFormDC, 0,0, SRCCOPY)

= SelectObject(hMemDC, hSavedBitmap)

---