Invalid handle from MsiGetProperty fn

[vigorvick]

Hi,

I'm invoking a dll using my installscript from a inscript execution "Immediate" custom action.

The following code inside the dll gives an error as ERROR_INVALID_HANDLE:

MsiGetPropertyA(hInstall, g_Prop[eProp].pPropname, &g_PropBuffer[nLenUsed], &nLenUsedorFree);

I found this out by debugging the code, any help or suggestion would be highly appreciated.

Thanks.

[joshstechnij]

The MsiGetProperty function should be used instead of MsiGetPropertyA. The handle passed to a script custom action is not directly passed to MsiGetPropertyA by the InstallScript engine.

[vigorvick]

I had tried using Msigetproperty also with the same result. Is there any way I can find out the exact cause of the invalid handle error using some return code?

[joshstechnij]

Where is the hInstall variable declared? Is it the parameter passed to your script custom action function? Can you reproduce this behavior in a sample project?