mark 输入法半角转换

全局代码

<DllImport("imm32.dll")> _
Public Function ImmGetContext(hWnd As IntPtr) As IntPtr
End Function

<DllImport("imm32.dll")> _
Public Function ImmGetOpenStatus(hIMC As IntPtr) As Boolean
End Function

<DllImport("imm32.dll")> _
Public Function ImmGetConversionStatus(hIMC As IntPtr, ByRef conversion As Integer, ByRef sentence As Integer) As Boolean
End Function

<DllImport("imm32.dll")> _
Public Function ImmReleaseContext(hWnd As IntPtr, hIMC As IntPtr) As Boolean
End Function

<DllImport("imm32.dll")> _
Public Function ImmSetConversionStatus(hIMC As IntPtr, conversion As Integer, sentence As Integer) As Boolean
End Function

Const IME_CMODE_FULLSHAPE As Integer = &H8

Public Sub SetHalfShape(AHandle As IntPtr)
 Dim vIme As IntPtr = ImmGetContext(AHandle)
 If ImmGetOpenStatus(vIme) Then
  \' 输入法是打开的
  Dim vMode As Integer = 0, vSentence As Integer = 0
  If ImmGetConversionStatus(vIme, vMode, vSentence) Then
   \' 获取输入法状态
   If (vMode And IME_CMODE_FULLSHAPE) > 0 Then
    \' 是全角
    vMode = vMode And (Not IME_CMODE_FULLSHAPE)
    ImmSetConversionStatus(vIme, vMode, vSentence)
   End If
  End If
 End If
 ImmReleaseContext(AHandle, vIme)
End Sub

enter事件，或者textchanged事件

Dim txt = e.Form.Controls("TextBox1").basecontrol
SetHalfShape(txt.handle)