LoadLibrary with a dll the references other dlls

I am using Matlab 7.10 and in my .m file use loadlibrary to connect to an external device. (call this a.dll) I can call and use functionality within my a.dll fine.

I have trouble using my a.dll loaded when it loads in other libraries(call this b.dll and c.dll) within a.dll It cannot find them.

I have placed the other dlls(b.dll & c.dll) that my library(a.dll) references in the same matlab directory (with the m files)

I thought I might be able to use loadlibrary to get them into scope, but I do not have .h files for these other dlls (b.dll & c.dll) and that seems to be required, nor do I want to write out a prototype for each of these nested dlls(there are more then just b and c)

If I use 'pwd' my current directory returns my matlab directory, is there somewhere else these dlls(b.dll, c.dll) should be placed?

Thank you

Answer 1

[Titus Edelhofer]

Hi,

a.dll can only find b.dll and c.dll, if b.dll and c.dll are on the system path (i.e., the path you get when you do

getenv('PATH')

Put c.dll to a folder on the system path (like c:\windows\system32) or add the folder to the system path.

Titus

[Greg Mort]

Ok, investigating further appears I don't get a dll not found rather a ERROR_BAD_EXE_FORMAT

193 (0xC1)

which would be because I am on a 64 bit machine and the b.dll is a 32 bit?

Any clue on how to resolve this or am I best to create a new forum question?

Thanks for your help

[Kaustubha Govind]

Yes, you cannot load a 32-bit DLL into 64-bit MATLAB. You can install 32-bit MATLAB on your machine which should then allow you to load the DLL. See http://www.mathworks.com/support/solutions/en/data/1-579TVF/index.html?solution=1-579TVF for installation instructions and http://www.mathworks.com/support/solutions/en/data/1-1CAT7/ for caveats.