C语言调用powerBuilder开发数据库

C语言编写数据库系统不方便，可以使用权PBNI接口来操作powerbuilder，开发数据库轻松。

// pbtest.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "stdio.h"typedef PBXEXPORT PBXRESULT (*P_PB_GetVM)(IPB_VM** vm);int main(int argc, char* argv[]){ IPB_Session* session;    IPB_VM* pbvm = NULL;    //Load the PowerBuilder VM module    HINSTANCE hinst = LoadLibrary("pbvm90.dll");     if ( hinst== NULL)   return 0;    fprintf(stderr, "Loaded PBVM successfully\n");  P_PB_GetVM getvm = (P_PB_GetVM)GetProcAddress      (hinst,"PB_GetVM");   if (getvm == NULL) return 0;     getvm(&pbvm);   if (pbvm == NULL) return 0;  LPCTSTR LibList[] = {"genapp.dll"};    if ( pbvm->CreateSession("genapp", LibList, 1,      &session) != PBX_OK )   {      fprintf(stderr, "Error in CreateSession\n");      return 1;   }  fprintf(stderr, "Created session successfully\n");  pbgroup group = session->FindGroup("nvo_mult",      pbgroup_userobject);   if (group == NULL)   return 0;      // Now find the class nvo_mult in the group     pbclass cls = session->FindClass(group,"nvo_mult");   if (cls == NULL)  return 0;      // Create an instance of the PowerBuilder object   pbobject pbobj = session->NewObject(cls);  PBCallInfo ci;     // To call the class member function f_mult,    // pass its signature as the last argument   // to GetMethodID      pbmethodID mid = session->GetMethodID(cls, "f_mult",      PBRT_FUNCTION, "III");    // Initialize call info structure based on method ID   session->InitCallInfo(cls, mid, &ci);  ci.pArgs-> GetAt(0)->SetInt(10);   ci.pArgs-> GetAt(1)->SetInt(20);  try   {        session->InvokeObjectFunction(pbobj, mid, &ci);       // Was PB exception thrown?       if (session->HasExceptionThrown())        {         // Handle PB exception           session->ClearException();       }    }   catch (...)   {      // Handle C++ exception   }    // Get the return value and print it to the console   pbint ret = ci.returnValue->GetInt();    fprintf(stderr, "The product of 123 and 45 is %i\n",    ret);  session->FreeCallInfo(&ci);   //delete &ci;    // Release session    session->Release();     return 0; FreeLibrary(hinst);}

 这个是帮助文档中的的例子，放在这里做个笔录.