ActiveX | from MFC to Qt5

[magrif]

I bought Fingerprint reader ZK7500, it SDK is written in MFC. I want to remake it to Qt.

1) to code

QAxWidget *ax = new QAxWidget();
ax->setControl(QString::fromUtf8("{CA69969C-2F27-41D3-954D-A48B941C3BA7}"));

QAxWidget *ax = new QAxWidget();
ax->setControl(QString::fromUtf8("{CA69969C-2F27-41D3-954D-A48B941C3BA7}"));

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I received a warning

QAxBase: Unhandled type LPSTR

QAxBase: Unhandled type LPSTR

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This is critical?

2) at MFC inbound events handled as follows:

BEGIN_EVENTSINK_MAP(CDemoDlg, CDialog)
    //{{AFX_EVENTSINK_MAP(CDemoDlg)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 8 /* OnImageReceived */, OnOnImageReceivedZkfpengx2, VTS_PBOOL)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 10 /* OnCapture */,      OnOnCaptureZkfpengx2,       VTS_BOOL VTS_VARIANT)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 9 /* OneEnroll */,       OnOnEnrollZkfpengx2,        VTS_BOOL VTS_VARIANT)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 5 /* OnFeatureInfo */,   OnOnFeatureInfoZkfpengx2,   VTS_I4)
    //}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

BEGIN_EVENTSINK_MAP(CDemoDlg, CDialog)
    //{{AFX_EVENTSINK_MAP(CDemoDlg)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 8 /* OnImageReceived */, OnOnImageReceivedZkfpengx2, VTS_PBOOL)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 10 /* OnCapture */,      OnOnCaptureZkfpengx2,       VTS_BOOL VTS_VARIANT)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 9 /* OneEnroll */,       OnOnEnrollZkfpengx2,        VTS_BOOL VTS_VARIANT)
	ON_EVENT(CDemoDlg,                    IDC_ZKFPENGX2, 5 /* OnFeatureInfo */,   OnOnFeatureInfoZkfpengx2,   VTS_I4)
    //}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

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How to do it on Qt? I have not found *.TLB file with definitions of functions.

3) I have many functions generated by MFC Wizard such as:

void SaveJPG(LPCTSTR FileName)
	{
		static BYTE parms[] = VTS_BSTR ;
                InvokeHelper(0x18, DISPATCH_METHOD, VT_EMPTY, NULL, parms, FileName);
	}
long InitEngine()
	{
		long result;
                InvokeHelper(0x1a, DISPATCH_METHOD, VT_I4, (void*)&result, NULL);
	        return result;
	}
...

void SaveJPG(LPCTSTR FileName)
	{
		static BYTE parms[] = VTS_BSTR ;
                InvokeHelper(0x18, DISPATCH_METHOD, VT_EMPTY, NULL, parms, FileName);
	}
long InitEngine()
	{
		long result;
                InvokeHelper(0x1a, DISPATCH_METHOD, VT_I4, (void*)&result, NULL);
	        return result;
	}
...

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I found this topic, but did not work out. How it correctly to remake to Qt.

Sorry for my Google Translate.

[anda_skoa]

Maybe check if the vendor has a real SDK, one that does not require any specific UI, at least not one abandoned years ago.

Cheers,
_

[d_stranz]

I have not found *.TLB file with definitions of functions.

You can #import (using MSVC) the DLL file, and it will create the .tli and .tlh files with the interface information. See this.

That might be enough to get you started wrapping the interface in Qt ActiveX methods calls.