How to call the functions inside a dll created using vb.net

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I have a .dll (custom specific: ICE.dll) file created using vb.net and there is a function inside: when i read the api spec, got the following information: request you to provide the code to open/close. tried dllcall, dllopen, dllclose but it doesnt work. any help with code will be really appreciated. Thanks a lot.

Best regards,


Service name:



byte ICE21 (byte status)

Parameters (in):


 (0-Open, 1- Close)

Return value:


0 if everything was OK. 


The function opens/closes the ICE plugin



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