微软.net精简框架常见问题及回答(中文版)(63)
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles MyBase.Load
Dim r As DialogResult = MessageBox.Show( _
"Are you sure you want to reset?", _
"Test", _
MessageBoxButtons.YesNo, _
MessageBoxIcon.Question, _
MessageBoxDefaultButton.Button2)
If r = DialogResult.Yes Then
ResetPocketPC()
End If
End Sub 'Form1_Load
6.18. How can I put an icon on the title bar regardless of the which form is active?
This is not supported with the current version of the .NET Compact Framework. You can, however, P/Invoke Pocket PC's notificaiton system to do this. Refer to the following for more information:
Sample Code:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnppc2k2/html/ppc_fications.asp
AYGShell APIs:
The native Notification APIs are: SHNotificationAdd, SHNotificationRemove, SHNotificationGetData, and SHNotificationUpdate.
6.19. How do I disable and capture hardware buttons?
Refer to the sample in the P/Invoke library.
http://msdn.microsoft.com/library/en-us/dnnetcomp/html/PInvokeLib.asp#PInvokeLib_Topic03
6.20. How do I hide the start icon?
The Start icon can be hidden using the SHFullScreen API. //C#
const uint SHFS_SHOWTASKBAR = 0x0001;
const uint SHFS_HIDETASKBAR = 0x0002;
const uint SHFS_SHOWSIPBUTTON = 0x0004;
const uint SHFS_HIDESIPBUTTON = 0x0008;
const uint SHFS_SHOWSTARTICON = 0x0010;
const uint SHFS_HIDESTARTICON = 0x0020;
[DllImport("aygshell.dll")]
static extern uint SHFullScreen(IntPtr hwndRequester, uint dwState);
[DllImport("coredll.dll")]
public static extern IntPtr GetCapture();
private void Form1_Load(object sender, System.EventArgs e)
{
Capture = true;
IntPtr hwnd = GetCapture();
Capture = false;
SHFullScreen(hwnd, SHFS_HIDESTARTICON);
}
'VB
Const SHFS_SHOWTASKBAR As Integer = &H1
Const SHFS_HIDETASKBAR As Integer = &H2
Const SHFS_SHOWSIPBUTTON As Integer = &H4
Const SHFS_HIDESIPBUTTON As Integer = &H8
Const SHFS_SHOWSTARTICON As Integer = &H10
Const SHFS_HIDESTARTICON As Integer = &H20
<DllImport("aygshell.dll")> _
Shared Function SHFullScreen(ByVal hwndRequester As IntPtr, ByVal dwState As Integer) As Integer
End Function
<DllImport("coredll.dll")> _
Public Shared Function GetCapture() As IntPtr
End Function
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Capture = True
Dim hwnd As IntPtr = GetCapture()
Capture = False
SHFullScreen(hwnd, SHFS_HIDESTARTICON)
End Sub 'Form1_Load
6.21. How do I enumerate, create, and terminate processes?
Refer to the sample:
6.22. Where can I find a centralized library of P/Invoke samples?
This sample demonstrates how to P/Invoke numerous useful native functions that are not directly available through the .NET Compact Framework. A test Form is provided that enumerates all available test procedures and allows the user to select and run them:
http://msdn.microsoft.com/library/en-us/dnnetcomp/html/PInvokeLib.asp
6.23. How do I play and record .WAV audio files with the Waveform Audio Inteface?
Learn how to use the Waveform Audio Interface to record and play ".wav" files:
http://msdn.microsoft.com/library/en-us/dnnetcomp/html/WaveInOut.asp
