设置打印机

void WINAPI PrintSet(LPCTSTR PrinterName, DWORD PaperSize, DWORD Height, DWORD Width, LPDWORD ret_code, LPTSTR errortext){DEVMODE* lv_devmode;DEVMODE* lv_devmode_2;PRINTER_INFO_2* lv_printer_info;LPTSTR lv_str, pDeviceName;HANDLE phPrinter;DWORD pcbNeeded, lv_dword;lv_printer_info = malloc( 500 );if (!OpenPrinter(PrinterName, &phPrinter, NULL)){free(lv_printer_info);*ret_code = GetLastError();lv_str = "打开打印机失败 !";strcpy(errortext, lv_str);return;}if (!GetPrinter(phPrinter, 2, lv_printer_info, 500, &pcbNeeded )){free(lv_printer_info);*ret_code = GetLastError();ClosePrinter(phPrinter);lv_str = "无法得到打印机参数 !";strcpy(errortext, lv_str);return;}lv_devmode = lv_printer_info->pDevMode;pDeviceName = lv_devmode->dmDeviceName;lv_dword = DocumentProperties(0, phPrinter, pDeviceName, lv_devmode, 0, DM_OUT_BUFFER);if (lv_dword<0){free(lv_printer_info);*ret_code = GetLastError();ClosePrinter(phPrinter);lv_str = "无法取得打印机参数 !";strcpy(errortext, lv_str);return;}// 修改DEVMODE结构， 设置纸张大小及其高度和宽度lv_devmode->dmFields = lv_devmode->dmFields|DM_ORIENTATION|DM_PAPERLENGTH|DM_PAPERWIDTH|DM_PAPERSIZE;lv_devmode->dmOrientation = DMORIENT_PORTRAIT ;lv_devmode->dmPaperSize = PaperSize ;lv_devmode->dmPaperLength = Height;lv_devmode->dmPaperWidth = Width;// 通过调用DOCUMENTPROPERTIES函数传会修改的DEVMODE结构，// 在调用时指定DM_IN_BUFFER|DM_OUT_BUFFERlv_devmode_2 = malloc(500);lv_dword = DocumentProperties(0, phPrinter, pDeviceName, lv_devmode_2, lv_devmode, DM_IN_BUFFER|DM_OUT_BUFFER);if (lv_dword<0){free(lv_devmode_2);free(lv_printer_info);*ret_code = GetLastError();ClosePrinter(phPrinter);lv_str = "无法设置打印机参数 !";strcpy(errortext, lv_str);return;}if (!SetPrinter(phPrinter, 2, lv_printer_info, NULL)){free(lv_printer_info);*ret_code = GetLastError();ClosePrinter(phPrinter);lv_str = "无法设置打印机参数 !";strcpy(errortext, lv_str);return;}free(lv_devmode_2);free(lv_printer_info);ClosePrinter(phPrinter);lv_str = "设置打印机参数成功 !";strcpy(errortext, lv_str);*ret_code = 1;return ;}