I have been able to find the Win32 version of the gpgme library called libgpgme-11.dll from the gpg4win package. I am trying to figure out how to call it from visual basic 6. I have first started by looking how to call C dlls from vb: http://support.microsoft.com/kb/106553 I want to call the gpgme_new function which takes one parameter which is a context. It is declared in the .h file (used when calling from c++) as: /* The context holds some global state and configration options, as well as the results of a crypto operation. */ struct gpgme_context; typedef struct gpgme_context *gpgme_ctx_t; /* Create a new context and return it in CTX. */ gpgme_error_t gpgme_new (gpgme_ctx_t *ctx); To start, I just tried to set it up and call it like: Declare Function gpgme_new Lib "libgpgme-11.dll" (ctx) Sub Main() Dim ctx Dim gpgme_error
gpgme_error = gpgme_new(ctx) End Sub It is able to find the dll and the reference to gpgme_new. If I put in the name of a function which doesn't exist, it complains. But it comes back with the error: Run-time error '49': Bad DLL calling convention I looked up this error and found: http://support.microsoft.com/kb/85108 This said something about calling ByVal which I tried and that didn't do anything. Seems to me, I need to figure out just what kind of object the ctx is and specify that specific type in the declaration. The way it is declared, it just looks like a pointer, but VB doesn't have a pointer type. I'm a beginner to this whole gpg and calling DLL thing. So I'm not even sure that it is possible to do this or if I'm just making a silly mistake in the declaration. If anyone can help out on how to call this dll, I would appreciate it. -thanks
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