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i am trying make a program that able to send out bits (HI or LOW) through parallel port. 4 pins as input, and the rest as output. i have downloaded a file name io.dll and try to load the file into my program by
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then it show 'can't add a reference to the specified file' how can i over come this problem??:confused:
hmmm....try to register the DLL on your machine first by running regsvr32 [your dll path] on your run prompt. Then look for it from your references...
it actually sounds like it's not an ActiveX DLL (ie. can't be registered). to test that do what vbud says, and it should say something about not finding an entry point or something. if that's the case, to use it, you'd have to declare the functions like you declare APIs, eg:
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after i have declare the io.dll as above, how do i set the port and send data out to test is it working??