OpcodeType Complex Type

Defines an operation within a component of the application. Used in conjunction with a task to identify the section of the application that is logging the event.

<xs:complexType name="OpcodeType"
            <xs:attribute name="name"
            <xs:attribute name="symbol"
            <xs:attribute name="value"
            <xs:attribute name="mofValue"
            <xs:attribute name="message"


Name Type Description
message strTableRef The localized display name for the opcode. The message string references a localized string in the stringTable section of the manifest.
mofValue UInt8Type Reserved for internal use only.
name QName The name of the opcode. This name must be unique within the scope of this provider.
symbol CSymbolType The symbol to use to reference the opcode in your application. The Message Compiler (MC.exe) uses the symbol to create a constant for the opcode in the header file that the compiler generates. If you do not specify a symbol, the compiler generates one for you.
value UInt8Type The opcode value. You can specify values in the range 10 and 239. For a list of predefined opcode values, see Remarks.


The following are the predefined opcode values that you can use. These values are defined in the Winmeta.xml file that is included in the Windows SDK.

Name Value Symbol Description
win:Info 0 WINEVENT_OPCODE_INFO An informational event.
win:Start 1 WINEVENT_OPCODE_START An event that represents starting an activity.
win:Stop 2 WINEVENT_OPCODE_STOP An event that represents stopping an activity. The event corresponds to the last unpaired start event.
win:DC_Start 3 WINEVENT_OPCODE_DC_START An event that represents data collection starting. These are rundown event types.
win:DC_Stop 4 WINEVENT_OPCODE_DC_STOP An event that represents data collection stopping. These are rundown event types.
win:Extension 5 WINEVENT_OPCODE_EXTENSION An extension event.
win:Reply 6 WINEVENT_OPCODE_REPLY A reply event.
win:Resume 7 WINEVENT_OPCODE_RESUME An event that represents an activity resuming after being suspended.
win:Suspend 8 WINEVENT_OPCODE_SUSPEND An event that represents the activity being suspended pending another activity's completion.
win:Send 9 WINEVENT_OPCODE_SEND An event that represents transferring activity to another component.
win:Receive 240 WINEVENT_OPCODE_RECEIVE An event that represents receiving an activity transfer from another component.


Requirement Value
Minimum supported client
Windows Vista [desktop apps only]
Minimum supported server
Windows Server 2008 [desktop apps only]