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 " )] extern static void PowerOffSystem(); private void 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 " )] extern static int KernelIoControl2( int dwIoControlCode, IntPtr lpInBuf, int nInBufSize, IntPtr lpOutBuf, int nOutBufSize, ref int lpBytesReturned); [DllImport( " Coredll.dll " )] extern static void SetCleanRebootFlag(); public void 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 private const uint EM_SETINPUTMODE = 0xDE ; private const uint EIM_SPELL = 0 ; private const uint EIM_AMBIG = 1 ; private const uint EIM_NUMBERS = 2 ; [DllImport( " coredll.dll " )] private static extern IntPtr GetFocus(); [DllImport( " coredll.dll " )] private static extern int SendMessage(IntPtr hWnd, uint Message, uint wParam, uint lParam); public static void 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 )] internal static extern uint LoadCursor( uint zeroValue , uint cursorID ); [DllImport( " coredll " , SetLastError = true )] internal static extern uint SetCursor( uint cursorHandle ); public Cursor(){} public static void ShowWaitCursor( bool bShowCursor) { uint cursorHandle = 0 ; if (bShowCursor) { const uint 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 internal static Int32 METHOD_BUFFERED = 0 ; internal static Int32 FILE_ANY_ACCESS = 0 ; internal static 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; internal static Int32 IOCTL_HAL_GET_DEVICEID = ((FILE_DEVICE_HAL) << 16 ) | ((FILE_ANY_ACCESS) << 14 ) | (( 21 ) << 2 ) | (METHOD_BUFFERED); [DllImport( " coredll.dll " ,SetLastError = true )] private static extern bool KernelIoControl(Int32 IoControlCode, IntPtr InputBuffer, Int32 InputBufferSize, byte [] OutputBuffer, Int32 OutputBufferSize, ref Int32 BytesReturned); #endregion #region 获得设备的ID号 private static string GetDeviceID() { int len = 256 ; int cb = 0 ; byte [] buffer = new byte [ 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