银行门户网站建设方案,大联盟平台推广,网站框架设计模板,外贸行业网站建设背景#xff1a;
“遍历当前用户的每一台虚拟打印机#xff0c;将其默认纸张设置为 A4 并设置为纵向。”
实现原理#xff1a;
1.从当前用户的注册表读取所有已配置的打印机#xff1b; 2.遍历每台打印机#xff1b; 3.输出其逻辑与实际纸张大小#xff1b; 4.尝试设置…背景
“遍历当前用户的每一台虚拟打印机将其默认纸张设置为 A4 并设置为纵向。”
实现原理
1.从当前用户的注册表读取所有已配置的打印机 2.遍历每台打印机 3.输出其逻辑与实际纸张大小 4.尝试设置为 A4 纸纵向 5.输出设置是否成功。
#include Windows.h
#include stdio.hvoid SetPrinterPaperSizeAndOrientation(HANDLE hPrinter, int nPaperIndex, int nOrientation)
{DEVMODE devMode;memset(devMode, 0, sizeof(DEVMODE));devMode.dmSize sizeof(DEVMODE);// 获取当前打印机的设备模式if (DocumentProperties(NULL, hPrinter, NULL, devMode, NULL, DM_OUT_BUFFER) ! IDOK){// 获取设备模式失败return;}// 修改纸张大小和方向devMode.dmPaperSize nPaperIndex; // 设置纸张大小devMode.dmOrientation nOrientation; // 设置纸张方向// 更新打印机的设备模式if (DocumentProperties(NULL, hPrinter, NULL, devMode, devMode, DM_IN_BUFFER | DM_OUT_BUFFER) ! IDOK){// 更新设备模式失败return;}// 获取逻辑高度和实际高度int nLogicHeight devMode.dmPelsHeight; // 逻辑高度int nActualHeight devMode.dmYResolution; // 实际高度
}// 获取打印机纸张信息
void GetPrinterPaperInfo(const TCHAR* pszPrinterName, int nLogicalWidth, int nLogicalHeight, int nPhysicalWidth, int nPhysicalHeight)
{HKEY hKey;LONG lResult;// 构造打印机注册表项路径TCHAR szKeyPath[MAX_PATH];_stprintf_s(szKeyPath, _T(Software\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers\\%s\\PrinterDriverData), pszPrinterName);// 打开打印机注册表项lResult RegOpenKeyEx(HKEY_LOCAL_MACHINE, szKeyPath, 0, KEY_READ, hKey);if (lResult ERROR_SUCCESS){TCHAR szData[MAX_PATH];DWORD dwDataSize sizeof(szData);// 获取逻辑纸张宽度lResult RegQueryValueEx(hKey, _T(PaperWidth), NULL, NULL, (LPBYTE)szData, dwDataSize);
if (lResult ERROR_SUCCESS)
{// 正确处理数据printf(Value data: %s\n, szData);
}
else if (lResult ERROR_MORE_DATA)
{printf(Buffer size too small\n);
}
else if (lResult ERROR_INVALID_PARAMETER)
{printf(Invalid parameter\n);
}
else
{printf(Error querying default registry value: %d\n, lResult);
}if (lResult ERROR_SUCCESS){sscanf_s(szData, %d, nLogicalWidth);}// 获取逻辑纸张高度lResult RegQueryValueEx(hKey, _T(PaperHeight), NULL, NULL, (LPBYTE)szData, dwDataSize);if (lResult ERROR_SUCCESS){sscanf_s(szData, %d, nLogicalHeight);}// 获取实际纸张宽度lResult RegQueryValueEx(hKey, _T(PaperWidthActual), NULL, NULL, (LPBYTE)szData, dwDataSize);if (lResult ERROR_SUCCESS){sscanf_s(szData, %d, nPhysicalWidth);}// 获取实际纸张高度lResult RegQueryValueEx(hKey, _T(PaperHeightActual), NULL, NULL, (LPBYTE)szData, dwDataSize);if (lResult ERROR_SUCCESS){sscanf_s(szData, %d, nPhysicalHeight);}RegCloseKey(hKey);}
}int main()
{HKEY hKey;LONG lResult;DWORD dwIndex 0;TCHAR szPrinterName[MAX_PATH];DWORD dwSize sizeof(szPrinterName);// 打开打印机列表注册表项lResult RegOpenKeyEx(HKEY_CURRENT_USER, _T(Software\\Microsoft\\Windows NT\\CurrentVersion\\Devices), 0, KEY_READ, hKey);if (lResult ERROR_SUCCESS){// 遍历打印机列表while (RegEnumKeyEx(hKey, dwIndex, szPrinterName, dwSize, NULL, NULL, NULL, NULL) ERROR_SUCCESS){int nLogicalWidth 0; // 逻辑纸张宽度int nLogicalHeight 0; // 逻辑纸张高度int nPhysicalWidth 0; // 实际纸张宽度int nPhysicalHeight 0; // 实际纸张高度// 获取打印机纸张信息GetPrinterPaperInfo(szPrinterName, nLogicalWidth, nLogicalHeight, nPhysicalWidth, nPhysicalHeight);// 输出获取的纸张信息printf(Printer Name: %s\n, szPrinterName);printf(Logical Paper Size: %d x %d\n, nLogicalWidth, nLogicalHeight);printf(Physical Paper Size: %d x %d\n, nPhysicalWidth, nPhysicalHeight);// 重置打印机名称缓冲区大小dwSize sizeof(szPrinterName);dwIndex;}RegCloseKey(hKey);}return 0;
}
