Sub PrintImageAt (HDC As OLE_HANDLE, X As Long, Y As Long, aWidth As Long, aHeight As Long)
This is a vb method definitions inside, this method shows that there is a an could not achieve, is the HDC As OLE_HANDLE, method: by (x, y) in accordance with the specified position (aWidth, aHeight) specifies the size of the display image, HDC said to display the image of the window of the device context handle,
The last sentence HDC in vb is defined as OLE_HANDLE type, what is this type? In vb how to define? On behalf of what? Can give you an example?" The window of the device context handle "what meaning be? How to get this value?

In addition, I how to implement in the PB?

CodePudding user response:

I find all the information on API PB but could not find PrintImageAt instructions. Help.

CodePudding user response:

You are making of fingerprints development?
See a similar function in fingerprint device development kit

If is of fingerprints, development kit with the DEMO

The study should be

HDC As OLE_HANDLE structure should be a

CodePudding user response:

You are making of fingerprints development?
See a similar function in fingerprint device development kit

If is of fingerprints, development kit with the DEMO

The study should be

HDC As OLE_HANDLE structure should be a

CodePudding user response:

Should be structure, this kind of thing, want to look at each other with the SDK.

CodePudding user response:

Thank teachers support, is to do fingerprint development, but there is no detail, SDK nor routines in the demo, just don't know HDC As OLE_HANDLE is what east east, inside the SDK description is called "to display the image of the window of the device context handle", don't know what you mean

CodePudding user response:

But there is no detail, SDK demo show little routines

Can't, and the DEMO is the foundation of the development, as far as I know a lot of fingerprints of development kit DEMO is very full, not just the VB DELPHI C ASP or even PB and VFP

It's best to communicate with factory about the little also should have the VB and C the DEMO

CodePudding user response:

The first parameter is simple with controls directly handle can '

CodePudding user response:

 Graphics canvas=panel1. CreateGraphics (); 
AxZKFPEngX1. PrintImageAt (canvas. GetHdc () ToInt32 (), 0, 0, axZKFPEngX1. ImageWidth, axZKFPEngX1. ImageHeight); 

CodePudding user response:

Study, help me top, hope the prawns are give some detailed introduction, I now use Java to do fingerprint identification...

CodePudding user response:

Is there any who use pb has to solve this problem? Qq 315724616

CodePudding user response:

Estimation is a device context (DC), and handles are similar, is a 32-bit integer, usually by getdc () function,