手机软件开发中的P/Invoke

手机软件开发中的P/Invoke

 

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手机软件开发中的P/Invoke

01/10/2006 01:03:00 PM - View : 107

.NET CF 中关闭手持设备（支持PPC和SMARTPHONE）

[DllImport("Coredll.dll")]
externstaticvoid PowerOffSystem();
privatevoid mIShutDown_Click(object sender, System.EventArgs e)
{
PowerOffSystem();
}

.NET CF 中重启函数

using System.Runtime.InteropServices;

public const uint FILE_DEVICE_HAL = 0x00000101;
public const uint METHOD_BUFFERED = 0;
public const uint FILE_ANY_ACCESS = 0;

public uint CTL_CODE(uint DeviceType, uint Function, uint Method, uint Access)
{
????return ((DeviceType << 16) | (Access << 14) | (Function << 2) | Method);
}

[DllImport("Coredll.dll")]
public extern static uint KernelIoControl
(
????uint dwIoControlCode,
????IntPtr lpInBuf,
????uint nInBufSize,
????IntPtr lpOutBuf,
????uint nOutBufSize,
????ref uint lpBytesReturned
);

uint ResetPocketPC()
{
????uint bytesReturned = 0;
????uint IOCTL_HAL_REBOOT = CTL_CODE(FILE_DEVICE_HAL, 15, 
??????METHOD_BUFFERED, FILE_ANY_ACCESS);
????return KernelIoControl(IOCTL_HAL_REBOOT, IntPtr.Zero, 0, 
??????IntPtr.Zero, 0, ref bytesReturned);
}

private void Form1_Load(object sender, System.EventArgs e)
{
????DialogResult r = MessageBox.Show
????(
????????"Are you sure you want to reset?",
????????"Test",
????????MessageBoxButtons.YesNo,
????????MessageBoxIcon.Question,
????????MessageBoxDefaultButton.Button2
????);

????if (r == DialogResult.Yes)
????{
????????ResetPocketPC();
????}
}

.NET CF中的硬启函数

[DllImport("Coredll.dll")]
externstaticint KernelIoControl2(int dwIoControlCode, IntPtr lpInBuf, int nInBufSize, IntPtr lpOutBuf, int nOutBufSize, refint lpBytesReturned);
[DllImport("Coredll.dll")]
externstaticvoid SetCleanRebootFlag();
publicvoid HardReset()
{
int IOCTL_HAL_REBOOT =0x101003C;
int bytesReturned =0;
SetCleanRebootFlag();
KernelIoControl2(IOCTL_HAL_REBOOT, IntPtr.Zero, 0, IntPtr.Zero, 0, ref bytesReturned);
}

.NET CF 中切换输入法

privateconstuint EM_SETINPUTMODE =0xDE;
privateconstuint EIM_SPELL =0;
privateconstuint EIM_AMBIG =1;
privateconstuint EIM_NUMBERS =2;
[DllImport("coredll.dll")]
privatestaticextern IntPtr GetFocus();
[DllImport("coredll.dll")]
privatestaticexternint SendMessage(IntPtr hWnd,uint Message, uint wParam, uint lParam);
publicstaticvoid txt_GotFocus(object sender, System.EventArgs e)
{
IntPtr hWnd;
hWnd = GetFocus();
SendMessage(hWnd, EM_SETINPUTMODE, 0, EIM_NUMBERS);
(sender as System.Windows.Forms.TextBox).SelectAll();
}

鼠标状态变换

[DllImport("coredll", SetLastError=true)]
internalstaticexternuint LoadCursor( uint zeroValue , uint cursorID );
[DllImport("coredll", SetLastError=true)]
internalstaticexternuint SetCursor( uint cursorHandle );
public Cursor(){}
publicstaticvoid ShowWaitCursor(bool bShowCursor)
{
uint cursorHandle =0;
if (bShowCursor)
{
constuint hourGlassCursorID =32514;
cursorHandle = LoadCursor(0, hourGlassCursorID);
}
SetCursor(cursorHandle);
}

获得设备ID号

#region 获得设备ID时所需要的变量及函数声明internalstatic Int32 METHOD_BUFFERED =0;
internalstatic Int32 FILE_ANY_ACCESS =0;
internalstatic Int32 FILE_DEVICE_HAL =0x00000101;
private System.Windows.Forms.MenuItem menuItem3;
private System.Windows.Forms.MenuItem menuItem4;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.TextBox tb_machineName;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.PictureBox pictureBox1;
internalstatic Int32 IOCTL_HAL_GET_DEVICEID = ((FILE_DEVICE_HAL) <<16) |
((FILE_ANY_ACCESS) <<14) | ((21) <<2) | (METHOD_BUFFERED);
[DllImport("coredll.dll",SetLastError=true)]
privatestaticexternbool KernelIoControl(Int32 IoControlCode, IntPtr
InputBuffer, Int32 InputBufferSize, byte[] OutputBuffer, Int32
OutputBufferSize, ref Int32 BytesReturned);
#endregion#region 获得设备的ID号privatestaticstring GetDeviceID()
{
int   len  =256;
int   cb  =0;
byte[]   buffer =newbyte[256];
//uint   ret;    StringBuilder sb  =new StringBuilder();
buffer[0] =0;
buffer[1] =1;
KernelIoControl(IOCTL_HAL_GET_DEVICEID, IntPtr.Zero, 0, buffer, len, ref cb);
Int32 dwPresetIDOffsset = BitConverter.ToInt32(buffer, 4);
Int32 dwPlatformIDOffset = BitConverter.ToInt32(buffer, 0xc);
Int32 dwPlatformIDSize = BitConverter.ToInt32(buffer, 0x10);
sb.Append(String.Format("{0:X8}-{1:X4}-{2:X4}-{3:X4}-",
BitConverter.ToInt32(buffer, dwPresetIDOffsset),
BitConverter.ToInt16(buffer, dwPresetIDOffsset+4),
BitConverter.ToInt16(buffer, dwPresetIDOffsset+6),
BitConverter.ToInt16(buffer, dwPresetIDOffsset+8)));
for(int i = dwPlatformIDOffset ; i < dwPlatformIDOffset + dwPlatformIDSize ; i ++)
{
sb.Append( String.Format("{0:X2}", buffer[i] ));
}
return sb.ToString();
}
#endregion