CODEWITHSUNDEEP
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Abluescarab
Abluescarab

Reputation: 547

What Keys Are Represented by the &H Hex Codes?

EDIT: I found an article that lists exactly what I needed: http://msdn.microsoft.com/en-us/library/ms646309(v=vs.85).aspx

Thanks for your help!

Original:

I'm wondering what keyboard keys are represented by the &H hex codes?

For example, I've found that &H1 is the ALT key, &H2 is the CONTROL key, and &H3 is both the ALT and CONTROL keys together. &H10 is the Shift key, it appears. I'm asking because I need to find out for a program I'm designing that needs to register a hotkey. The user has the option to hide it, and I want to make sure that they can show it again by pressing a hotkey, but I need to figure out what the hex keys are to use the code that I found.

Here's part of the code I found:

Public Const MOD_ALT As Integer = &H1 'Alt key
Public Const WM_HOTKEY As Integer = &H312

<DllImport("User32.dll")> _
Public Shared Function RegisterHotKey(ByVal hwnd As IntPtr, _
                    ByVal id As Integer, ByVal fsModifiers As Integer, _
                    ByVal vk As Integer) As Integer
End Function

<DllImport("User32.dll")> _
Public Shared Function UnregisterHotKey(ByVal hwnd As IntPtr, _
                    ByVal id As Integer) As Integer
End Function

Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
    If m.Msg = WM_HOTKEY Then
        Dim id As IntPtr = m.WParam
        Select Case (id.ToString)
            Case "100"
                MessageBox.Show("You pressed ALT+D key combination")
            Case "200"
                MessageBox.Show("You pressed ALT+C key combination")
        End Select
    End If
    MyBase.WndProc(m)
End Sub

And this registers the hotkeys when the form loads:

RegisterHotKey(Me.Handle, 100, &H3, Keys.D)
RegisterHotKey(Me.Handle, 200, Keys.Alt, Keys.C)

This is the thread I was looking at on the MSDN forums -- I copied the code from the featured answer.

I've done a thorough Google search and I've searched here on StackOverflow, and I can't find anything.

Is there maybe a list of the hex codes somewhere, or instructions or something?

Thanks!

Upvotes: 0

Views: 9443

Answers (1)

M.A. Hanin
M.A. Hanin

Reputation: 8084

In that MSDN thread you've linked there is a link to Virtual Key Codes. In addition, check the System.Windows.Forms.Keys enumeration.

Notice that the RegisterHotKey method takes the following arguments: hWnd, id, fsModifiers and vk. VK is where you place the VirtualKey code. Regarding fsModifiers:

The keys that must be pressed in combination with the key specified by the uVirtKey parameter in order to generate the WM_HOTKEY message. The fsModifiers parameter can be a combination of the following values: MOD_ALT (0x0001), MOD_CONTROL (0x0002), MOD_NOREPEAT (0x4000), MOD_SHIFT (0x0004), MOD_WIN (0x0008).

Upvotes: 1

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