LanguageService.QueryService Method
Returns the request interface from the specified service.
Namespace: Microsoft.VisualStudio.Package
Assembly: Microsoft.VisualStudio.Package.LanguageService (in Microsoft.VisualStudio.Package.LanguageService.dll)
Syntax
'Declaration
Public Overridable Function QueryService ( _
ByRef guidService As Guid, _
ByRef iid As Guid, _
<OutAttribute> ByRef obj As IntPtr _
) As Integer
'Usage
Dim instance As LanguageService
Dim guidService As Guid
Dim iid As Guid
Dim obj As IntPtr
Dim returnValue As Integer
returnValue = instance.QueryService(guidService, _
iid, obj)
public virtual int QueryService(
ref Guid guidService,
ref Guid iid,
out IntPtr obj
)
public:
virtual int QueryService(
Guid% guidService,
Guid% iid,
[OutAttribute] IntPtr% obj
)
public function QueryService(
guidService : Guid,
iid : Guid,
obj : IntPtr
) : int
Parameters
guidService
Type: System.Guid%[in] The GUID of the service to query.
iid
Type: System.Guid%[in] The GUID of the desired interface.
obj
Type: System.IntPtr%[out] An unmarshaled pointer to the interface.
Return Value
Type: System.Int32
If successful, returns S_OK; otherwise, returns an error code.
Implements
IServiceProvider.QueryService(Guid%, Guid%, IntPtr%)
Remarks
The base method calls LanguageService.GetService to obtain the IOleServiceProvider interface and passes the call on to its QueryService. This method is an implementation of QueryService.
Examples
This example shows how to use this method to query for an interface and marshal the resulting pointer into an actual interface object.
IVsUIShell GetUIShell(Microsoft.VisualStudio.OLE.Interop.IServiceProvider pProvider)
{
IVsUIShell pUIShell = null;
IntPtr ptr = IntPtr.Zero;
pProvider.QueryService.(typeof(SVsUIShell).GUID,ptr);
if (ptr != IntPtr.Zero)
{
pUIShell = (IVsUIShell)Marshal.GetObjectForIUnknown(ptr);
}
return pUIShell;
}
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.