Call the Run() method of the Script control in C++
This article demonstrates how to use the Microsoft Script control to call functions or subroutines.
Original product version: Visual C++
Original KB number: 229669
Summary
The Script control has four methods. One of them is Run()
, which runs a subroutine or a function. Before you call this method, specify the language of the script, set AllowUI
, and add the following code to the script control.
Sample code
#include <stdio.h>
#import "C:\winnt\system32\msscript.ocx" // msscript.ocx
using namespace MSScriptControl;
int main(void)
{
HRESULT hr = CoInitialize(NULL);
IScriptControlPtr pScriptControl(__uuidof(ScriptControl));
// Create a VARIANT array of VARIANTs which hold BSTRs
LPSAFEARRAY psa;
SAFEARRAYBOUND rgsabound[] = { 3, 0 }; // 3 elements, 0-based
int i;
psa = SafeArrayCreate(VT_VARIANT, 1, rgsabound);
if (!psa)
{
return E_OUTOFMEMORY;
}
VARIANT vFlavors[3];
for (i = 0; i < 3; i++)
{
VariantInit(&vFlavors[i]);
V_VT(&vFlavors[i]) = VT_BSTR;
}
V_BSTR(&vFlavors[0]) = SysAllocString(OLESTR("Vanilla"));
V_BSTR(&vFlavors[1]) = SysAllocString(OLESTR("Chocolate"));
V_BSTR(&vFlavors[2]) = SysAllocString(OLESTR("Espresso Chip"));
long lZero = 0;
long lOne = 1;
long lTwo = 2;
// Put Elements to the SafeArray:
hr = SafeArrayPutElement(psa, &lZero,&vFlavors[0]);
hr = SafeArrayPutElement(psa, &lOne,&vFlavors[1]);
hr = SafeArrayPutElement(psa, &lTwo,&vFlavors[2]);
// Free Elements from the SafeArray:
for(i=0;i<3;i++)
{
SysFreeString(vFlavors[i].bstrVal);
}
// Set up Script control properties
pScriptControl->Language = "JScript";
pScriptControl->AllowUI = TRUE;
pScriptControl->AddCode(
"function MyStringFunction(Argu1,Argu2,Argu3)\
{ return \"hi there\" ;}" );
// Call MyStringFunction with the two args:
_variant_t outpar = pScriptControl->Run("MyStringFunction", &psa);
// Convert VARIANT to C string:
_bstr_t bstrReturn = (_bstr_t)outpar;
char *pResult = (char *)bstrReturn;
// Print the result out:
printf("func=%s\n",pResult);
// Clean up:
SafeArrayDestroy(psa);
CoUninitialize();
return(0);
}
References
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