c – 如何获取打印机设备上下文？

最简单的方法是在使用win32 API调用PrintDlg之后使用PRINTDLG.hDevMode和PRINTDLG.hDevNames构造设备上下文,或者如果使用MFC则调用CPrintDialog :: GetPrinterDC.

如果使用MFC：

CPrintDialog dlgPrint(falSE,PD_USEDEVMODECOPIES);
HDC hPrinterDC = dlgPrint.GetPrinterDC();

或win32 API：

HDC hPrinterDC = NULL;
PRINTDLG dlgPrint;
if (PrintDlg(&dlgPrint) && dlgPrint.hDevMode != NULL)
{
    DEVNAMES *pDevNames = (DEVNAMES*)GlobalLock(dlgPrint.hDevNames);
    DEVMODE* pDevMode = NULL;
    if (dlgPrint.hDevMode != NULL)
        pDevMode = GlobalLock(dlgPrint.hDevModE);
    hPrinterDC = CreateDC((LPCTSTR)pDevNames + pDevNames->wDriverOffset,(LPCTSTR)pDevNames + pDevNames->wDeviceOffset,(LPCTSTR)pDevNames + pDevNames->wOutputOffset,pDevModE);
    GlobalUnlock(dlgPrint.hDevNames);
    if (dlgPrint.hDevMode != NULL)
        GlobalUnlock(dlgPrint.hDevModE);
}