How to convert char * to BSTR?

Question

How can I pass a char * from C dll to VB

Here is sample code:

void Cfunc(char *buffer,int len)
{
  BSTR buf_bstr = SysAllocString((BSTR)buffer);
  V         


        

Answer 1

This is the code I wrote using sharptooths answer

    int wslen = MultiByteToWideChar(CP_ACP, 0, str, strlen(str), 0, 0);
    BSTR bstr = SysAllocStringLen(0, wslen);
    MultiByteToWideChar(CP_ACP, 0, str, strlen(str), bstr, wslen);
    // Use bstr here
    SysFreeString(bstr);

Note that using -1 for the length of the string results in the null terminator being included in the result