C# Signature:
[DllImport("user32.dll")]
static extern int ToAscii(uint uVirtKey, uint uScanCode, byte [] lpKeyState,
byte[] lpwTransKey, uint fuState);
// or
[DllImport("user32.dll")]
static extern int ToAscii(uint uVirtKey, uint uScanCode, byte [] lpKeyState,
[Out] StringBuilder lpChar, uint uFlags);
VB Signature:
<DllImport("user32")> _
Public Function ToAscii( _
ByVal uVirtKey As Integer, _
ByVal uScanCode As Integer, _
ByVal lpKeyState() As Byte, _
ByVal lpChar As StringBuilder, _
ByVal uFlags As Integer)
End Function
'or..
Public Declare Function ToAscii Lib "user32" (ByVal uVirtKey As Win32CONST.KeyEvent, ByVal uScanCode As Integer, ByVal lpKeyState() As Byte, ByRef lpChar As Integer, ByVal uFlags As Win32CONST.ToAsciiFlags) As Integer
User-Defined Types:
Public Enum ToAsciiFlags As Integer
MENU_IS_ACTIVE = 1
MENU_IS_INACTIVE = 0
End Enum
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
<DllImport("User32.dll")> _
Public Shared Function ToAscii(ByVal uVirtKey As Integer, ByVal uScanCode As Integer, ByVal lpbKeyState As Byte(), ByVal lpChar As Byte(), ByVal uFlags As Integer) As Integer
End Function
<DllImport("User32.dll")> _
Public Shared Function GetKeyboardState(ByVal pbKeyState As Byte()) As Integer
End Function
Public Shared Function GetAsciiCharacter(ByVal uVirtKey As Integer, ByVal uScanCode As Integer) As Char
Dim lpKeyState As Byte() = New Byte(255) {}
GetKeyboardState(lpKeyState)
Dim lpChar As Byte() = New Byte(1) {}
If ToAscii(uVirtKey, uScanCode, lpKeyState, lpChar, 0) = 1 Then
Return Chr(lpChar(0))
Else
Return New Char()
End If
End Function
Alternative Managed API:
Do you know one? Please contribute it!
