PowerBuilder Native Interface Programmers Guide and Reference
PBNI Interfaces, Structures, and Methods

Description

Passes the IPB_VM interface to the user.

Syntax

PB_GetVM (IPB_VM** vm)

Examples

This example loads the PowerBuilder VM and calls the f_getrowcount function on the nvo_dw custom class user object:

#include <pbext.h>
#include <iostream.h>
typedef PBXEXPORT PBXRESULT (*P_PB_GetVM)(IPB_VM** vm);

class LibraryLoader
{
public:
LibraryLoader(LPCSTR libname)
{
d_hinst = LoadLibrary(libname);
}

~LibraryLoader()
{
FreeLibrary(d_hinst);
}

operator HINSTANCE()
{
return d_hinst;
}

private:
HINSTANCE d_hinst;
};

int main()
{
int int_rowcount;
PBXRESULT ret;
LibraryLoader loader("pbvm190.dll");
if ((HINSTANCE)loader == NULL) return 0;

P_PB_GetVM getvm = (P_PB_GetVM)
GetProcAddress((HINSTANCE)loader, "PB_GetVM");
if (getvm == NULL) return 0;

IPB_VM* vm = NULL;
getvm(&vm);
if (vm == NULL) return 0;
static const char *liblist[] = 
{
"load_pbvm.pbl"
};

IPB_Session* session = NULL;
ret = vm->CreateSession
("load_pbvm", liblist, 1, &session);
if (ret!= PBX_OK) 
 {
cout << " Create session failure!" << endl;
return 0;
}
return 1;
}

Usage

To load the PowerBuilder VM and run a PowerBuilder application in a third-party server or application, you first create an IPB_VM object using the PB_GetVM method. Then, create an IPB_Session object within IPB_VM, using the application's name and library list as arguments.

See also

CreateSession