Here is my script:
#include "isrt.h"
#include "iswi.h"
export prototype Get_Reg_Val(HWND);
function Get_Reg_Val(hMSI)
STRING svClass, svProp;
NUMBER nRootKey, nSize, nvType, nBuffer;
begin
nRootKey = HKEY_LOCAL_MACHINE;
nBuffer = 255;
RegDBSetDefaultRoot (nRootKey);
RegDBGetKeyValueEx ("Software", "MyVal", nvType, svClass, nSize);
MsiSetProperty(hMSI,"MYVAL", svClass);
MessageBox(svClass, INFORMATION);
MsiGetProperty(hMSI,"MYVAL",svProp,nBuffer);
MessageBox(svProp, INFORMATION);
end;
Thank You