My.Computer.Registry.PerformanceData Property
Returns a RegistryKey type, which provides access to HKEY_PERFORMANCE_DATA.
' Usage
Dim value As Microsoft.Win32.RegistryKey = My.Computer.Registry.PerformanceData
' Declaration
Public ReadOnly Property PerformanceData As Microsoft.Win32.RegistryKey
Property Value
Remarks
HKEY_PERFORMANCE_DATA is used to access performance information for software components. Each software component creates keys for its objects and counters when it is installed and writes counter data while it is executing. This data is not stored in the registry, although the registry is used to access it. Instead, calling registry functions via HKEY_PERFORMANCE_DATA causes the system to collect the data from the appropriate system object managers.
This key does not exist on Windows 98 systems; an attempt to use it other than calling the Name method will throw an IOException.
This key cannot normally be written to; attempting to create a subkey on it will throw an IOException.
The RegistryPermission class, which is in the System.Security.Permissions namespace, controls access to registry variables. Registry variables should not be stored in memory locations where code without RegistryPermission can access them. Similarly, when granting permissions, grant the fewest privileges necessary to get the job done.
Registry permission access values are defined by the RegistryPermissionAccess enumeration. The following table details its members.
Value |
Description |
|---|---|
AllAccess |
Create, read, and write access to registry variables. |
Create |
Create access to registry variables. |
NoAccess |
No access to registry variables. |
Read |
Read access to registry variables. |
Write |
Write access to registry variables. |
Tasks
The following table lists examples of tasks involving the My.Computer.Registry object.
To |
See |
|---|---|
Create a registry key |
How to: Create a Registry Key and Set Its Values in Visual Basic |
Delete a registry key |
|
Determine whether a value exists in a registry key |
How to: Determine if a Value Exists in a Registry Key in Visual Basic |
Read a value from a registry key |
|
Set a value in a registry key |
Example
This example gets the value ThisSoftware from the MyCompany subkey.
My.Computer.Registry.PerformanceData.GetValue("MyCompany\ThisSoftware")
Requirements
Namespace:Microsoft.VisualBasic.MyServices
Class:RegistryProxy (provides access to Registry)
Assembly: Visual Basic Runtime Library (in Microsoft.VisualBasic.dll)
Availability by Project Type
Project type |
Available |
|---|---|
Windows Application |
Yes |
Class Library |
Yes |
Console Application |
Yes |
Windows Control Library |
Yes |
Web Control Library |
Yes |
Windows Service |
Yes |
Web Site |
Yes |
Permissions
No permissions are required.
See Also
Tasks
Troubleshooting: Manipulating the Registry
Concepts
Reading from and Writing to the Registry Using My