C # operating Camera

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Nonsense to this, directly on the code

Private Const int ws_child = 0x40000000; 1073741824
Private Const int ws_visible = 0x10000000; 268435456
Private Const int wm_user = 0x400; 1024
Private Const int wm_cap_start = Wm_user; 1024
Private Const int wm_cap_stop = Wm_cap_start + 68; 1092
Private Const int Wm_cap_driver_connect = Wm_cap_start + 10; 1034
Private Const int Wm_cap_driver_disconnect = Wm_cap_start + 11; 1035
Private Const int WM_CAP_SAVEDIB = Wm_cap_start + 25; 1049
Private Const int wm_cap_grab_frame = Wm_cap_start + 60; 1084
Private Const int wm_cap_sequence = Wm_cap_start + 62; 1086
Private Const int Wm_cap_file_set_captrue_filea = Wm_cap_start + 20; 1044
Private Const int Wm_cap_sequence_nofile = Wm_cap_start + 63; 1087
Private Const int Wm_cap_capture_image_clipboard = Wm_cap_start + 30; 1054 copy the captured image to the clipboard
Private Const int Wm_cap_set_overlay = Wm_cap_start + 51; 1075
Private Const int Wm_cap_set_preview = Wm_cap_start + 50; 1074
Private Const int Wm_cap_set_callback_videostream = Wm_cap_start + 6; 1030
Private Const int WM_CAP_SET_CALLBACK_ERROR = Wm_cap_start + 2; 1026
Private Const int WM_CAP_SET_CALLBACK_STATUSA = Wm_cap_start + 3; 1027
Private Const int wm_cap_set_callback_frame = Wm_cap_start + 5; 1029
Private Const int Wm_cap_set_scale = Wm_cap_start + 53; 1077
Private Const int wm_cap_set_previewrate = Wm_cap_start + 52; 1076
Private Const int Wm_cap_dlg_videosource = Wm_cap_start + 42; 1066 Select Camera

<summary>
Turn on the video camera
</summary>
<returns></returns>
public static void Start ()
{
if (Bworkstart)
{
Return
}
byte[] LpszName = new byte[100];
Try
{
HWNDC = Windows.capcreatecapturewindow (lpszName, Ws_child | Ws_visible, Mleft, Mtop, Mwidth, Mheight, mcontrolptr, 0);
if (Hwndc.toint32 ()! = 0)
{
Windows.sendmessage (HWNDC, wm_cap_set_callback_videostream, 0, 0); Set the return video stream
Windows.sendmessage (HWNDC, wm_cap_set_callback_error, 0, 0); Set return error
Windows.sendmessage (HWNDC, Wm_cap_set_callback_statusa, 0, 0); Set the return status
===================== this one is slower =======================
Windows.sendmessage (HWNDC, wm_cap_driver_connect, 0, 0); Device connection
//=====================================================
Windows.sendmessage (HWNDC, wm_cap_sequence, 0, 0); Start capturing
//=====================================================
Windows.sendmessage (HWNDC, Wm_cap_set_scale, 1, 0); Set scale
Windows.sendmessage (HWNDC, Wm_cap_set_previewrate, 66, 0); Set the preview speed
Windows.sendmessage (HWNDC, Wm_cap_set_overlay, 1, 0); Set Overlay
Windows.sendmessage (HWNDC, Wm_cap_set_preview, 1, 0); Set preview


Bworkstart = true;
}
return true;
}
catch (Exception)
{
return false;
}
Finally
//{
Write Log Global.log.Write ("SendMessage");
Logclass.writelog ("SendMessage");
//}
}

<summary>
Turn off the video camera
</summary>
public static void Stop ()
{
Windows.sendmessage (HWNDC, wm_cap_driver_disconnect, 0, 0);
Bworkstart = false;
}

<summary>
Grab a picture or take a picture and save it to the specified path
</summary>
<param name= "path" > Path to save BMP file </param>
public static void Grabimage (string path)
{
IntPtr hbmp = marshal.stringtohglobalansi (path);
Windows.sendmessage (HWNDC, Wm_cap_savedib, 0, Hbmp.toint32 ()); 0x41e
}

<summary>
Capture image Copy to clipboard
</summary>
<returns></returns>
public static bool CopyToClipboard ()
{
Return Windows.sendmessage (HWNDC, Wm_cap_capture_image_clipboard, 0, 0);
}

C # operating Camera