qt通过打印驱动打开钱箱

#include "myqtcash.h" #include <QtCore/QLibrary> #include <QMessageBox> #include "PrinterDLL.h" myqtcash::myqtcash(QWidget *parent) : QMainWindow(parent) { ui.setupUi(this); } myqtcash::~myqtcash() { } void myqtcash::on_openCash_clicked() { //这里看下直接调用打开钱箱是否可以 //这里如果不能用qt实现 我直接用windows来搞 QString strdllpath(""); strdllpath = QCoreApplication::applicationDirPath(); strdllpath += "/dll/"; QString strhttpdllpath(""); strhttpdllpath = strdllpath + "PrinterDLL.dll"; QLibrary myLib(strhttpdllpath); typedef int (*pWz_Open)(const char* szPrinterName, enum PRINTER_TYPE printerType); pWz_Open cat_Open = (pWz_Open) myLib.resolve("Wz_Open"); typedef int (*pWz_Close)(); pWz_Close cat_Close = (pWz_Close) myLib.resolve("Wz_Close"); typedef int (*pWz_OpenCashBox)(); pWz_OpenCashBox cat_OpenCashBox = (pWz_OpenCashBox) myLib.resolve("Wz_OpenCashBox"); if (cat_Open != NULL && cat_Close != NULL && cat_OpenCashBox != NULL) { if (cat_Open("USB", POS_OPEN_BYUSB_PORT) != POS_SUCCESS) { QMessageBox::information(this, "msg", QStringLiteral("打开usb端口失败")); return; } int nret = cat_OpenCashBox(); if (nret != POS_SUCCESS) { QString strError(""); strError = QString("failed open cashbox, error:%1").arg(nret); QMessageBox::information(this, "msg", strError); cat_Close(); return; } cat_Close(); } }