> I tried using MsiGetProductInfo with
> INSTALLPROPERTY_ASSIGNMENTTYPE, however the function returned
> the error "Unknown Property". Was I supposed to use this
> value with MsiGetProductInfo or is there another function I
> should be using?
>
This, I think, works for me:
extern "C" UINT __stdcall SetInstallMode(MSIHANDLE hInstall) {
TCHAR buf[MAX_PATH+1];
DWORD buflen = sizeof(buf)/sizeof(TCHAR); //+1 for trailing null
BOOL bResult = FALSE;
if ( MsiGetProperty(hInstall,TEXT("UpgradeCode"),buf,&buflen) ==
ERROR_SUCCESS ) {
TCHAR szProductCode[64]; // buffer for product code string
GUID, 39 chars
DWORD dwIndex=0;
BOOL fPerMachine = FALSE;
while (
::MsiEnumRelatedProducts(buf,0,dwIndex,szProductCode) == ERROR_SUCCESS ) {
TCHAR szAssignmentType[10] = {0};
DWORD cchAssignmentType =
sizeof(szAssignmentType)/sizeof(szAssignmentType[0]);
// Determine assignment type of product
// This indicates whether the product
// instance is per-user or per-machine
if (ERROR_SUCCESS ==
MsiGetProductInfo(szProductCode,INSTALLPROPERTY_ASSIGNMENTTYPE,szAssignmentT
ype,&cchAssignmentType))
{
// 0=>Per user, 1=> per machine..
if ('1' == szAssignmentType[0])
fPerMachine = TRUE;
}
dwIndex++;
}
// If anything is permachine, then set ALLUSERS=1 (admin
mode).
if ( fPerMachine ) {
::MsiSetProperty(hInstall,TEXT("ALLUSERS"),TEXT("1"));
}
}
return 0;
}
Someone can now tell me what's wrong with it before we release the next
version of our product <g> (though it doesn't look like my style of coding
so I probably got it from somewhere on the web).
Pete Cole.
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