ViewFilter.HandlePreExec(Guid, UInt32, UInt32, IntPtr, IntPtr) ViewFilter.HandlePreExec(Guid, UInt32, UInt32, IntPtr, IntPtr) ViewFilter.HandlePreExec(Guid, UInt32, UInt32, IntPtr, IntPtr) ViewFilter.HandlePreExec(Guid, UInt32, UInt32, IntPtr, IntPtr) Method

Definition

Handles pre-processing before a command is executed.

public:
 virtual bool HandlePreExec(Guid % guidCmdGroup, System::UInt32 nCmdId, System::UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut);
public virtual bool HandlePreExec (ref Guid guidCmdGroup, uint nCmdId, uint nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut);
abstract member HandlePreExec :  * uint32 * uint32 * nativeint * nativeint -> bool
override this.HandlePreExec :  * uint32 * uint32 * nativeint * nativeint -> bool
Public Overridable Function HandlePreExec (ByRef guidCmdGroup As Guid, nCmdId As UInteger, nCmdexecopt As UInteger, pvaIn As IntPtr, pvaOut As IntPtr) As Boolean
Parameters
guidCmdGroup
Guid Guid Guid Guid

[in] The GUID of the command group.

nCmdId
UInt32 UInt32 UInt32 UInt32

[in] The specific ID of the command from the command group. This identifies the command to execute.

nCmdexecopt
UInt32 UInt32 UInt32 UInt32

[in] Additional parameters for the command (packed into a 32-bit value).

pvaIn
IntPtr IntPtr IntPtr IntPtr

[in] An unmarshaled pointer to a Variant object holding any parameters required by the command. This can be a null value indicating there are no additional parameters.

pvaOut
IntPtr IntPtr IntPtr IntPtr

[in, out] An unmarshaled pointer to a Variant object to hold the result of the command, if any.

Returns

Returns true if the command was actually handled in the pre-processing; otherwise, returns false.

Remarks

This method is called before a command is executed. However, this method can handle the command itself, in which case this method returns true, indicating the command needs no further processing.

The base method obtains the expansion provider and calls the HandlePreExec method on the ExpansionProvider object if the object exists. If the expansion provider handles the call then this method does nothing else. Otherwise, all commands supported by the base ViewFilter class are handled here and true is returned. Returns false, if the command is not supported.

Applies to