# MsiQueryProductState

```csharp
[DllImport("msi.dll", CharSet = CharSet.Auto)]
public static extern int MsiQueryProductState(
   [MarshalAs(UnmanagedType.LPTStr)] string szProduct
);
```

Microsoft documentation: [Link](https://learn.microsoft.com/en-us/windows/win32/api/msi/nf-msi-msiqueryproductstatea)