Using DLL`s
BlitzMax Forums/BlitzMax Programming/Using DLL`s
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| How do you use an externeal DLL in MAX ?? B3D you just created a .lib file with the function declares in it Local DllHandle = LoadLibraryA("wsc32.dll") Local SioReset:Int(port:Int, buf1:Int, buf2:Int)"Win32" = GetProcAddress(DllHandle,"SioReset") seems to work so far but not sure why ? some functions require a pointer to a string or memory block ,, how is this done ?? |
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| hi maverick, i am not sure i fully comprehend the scope of your questions, but if it is working it is because you are doing the right things. you must have a "import pub.win32" somewhere before the code in your posting. is this true? |
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| some functions require a pointer to a string or memory block ,, how is this done ?? use ptr and varptr or for a string, you can usually get away with $z (cstring) or string.ToCString() |
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| getting back to why it is working (the first question). you are explicitly loading the dll (loadlibrary) and asking (getprocaddress) for the address in memory (pointer) of a particular function which i am assuming you are interested in calling. can you call "SioReset" ? if so, then you have answered your first question by yourself already. perturbatio has answered your second question |
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| Hi thanks for the reply. I basically just looked around other posts and cobbled together the above code to see if it would work which it does :) I can call SioReset from the DLL and this works ,but comming from B3D and only now playing with the trial version I don`t really understand why it works yet (I`m used to the DECLS files in B3D) I have noticed people using the following sort of thing extern "win32" function int:messageboxA blah blah end function function int:whatever blah blah end function end extern but this format I have only used with windows API calls , i`m assuming that once you declare the function like funtion messagebox($Z) end function you could then just write messagebox("hello") and the function would be called, this seems easier than the way I did it. To be honest the inline documentation for max is the SH1TS I couldn`t find loadlibraryA in any of it but it seems to work ,, how do people find out about these if the documentation is so poor ? |
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