将输入法设置为半角

using System.Runtime.InteropServices;

[DllImport("imm32.dll")]

public static extern IntPtr ImmGetContext(IntPtr hWnd);

[DllImport("imm32.dll")]

public static extern bool ImmGetOpenStatus(IntPtr hIMC);

[DllImport("imm32.dll")]

public static extern bool ImmGetConversionStatus(IntPtr hIMC,

ref int conversion, ref int sentence);

[DllImport("imm32.dll")]

public static extern bool ImmReleaseContext(IntPtr hWnd, IntPtr hIMC);

[DllImport("imm32.dll")]

public static extern bool ImmSetConversionStatus(IntPtr hIMC,

int conversion, int sentence);

const int IME_CMODE_FULLSHAPE= 0x0008;

public static void SetHalfShape(IntPtr AHandle)

{

IntPtr vIme = ImmGetContext(AHandle);

if (ImmGetOpenStatus(vIme)) // 输入法是打开的

{

int vMode = 0, vSentence = 0;

if (ImmGetConversionStatus(vIme, ref vMode, ref vSentence)) // 获取输入法状态

{

if ((vMode & IME_CMODE_FULLSHAPE) > 0) // 是全角

{

vMode &= (~IME_CMODE_FULLSHAPE);

ImmSetConversionStatus(vIme, vMode, vSentence);

}

}

}

ImmReleaseContext(AHandle, vIme);

}

private void button1_Click(object sender, EventArgs e)

{

SetHalfShape(textBox1.Handle);

}