Visual Basic Source Code/Visual Basic Source Code.iso/vbsource/easyvi1a/vbmemcap.frm

Visual Basic Form | 1997-11-18 | 5KB | 153 lines

VERSION 5.00
Begin VB.Form frmMain
   Caption         =   "VB Memcap"
   ClientHeight    =   3480
   ClientLeft      =   165
   ClientTop       =   735
   ClientWidth     =   4185
   LinkTopic       =   "Form1"
   ScaleHeight     =   232
   ScaleMode       =   3  'Pixel
   ScaleWidth      =   279
   StartUpPosition =   3  'Windows Default
   Begin VB.Menu mnuFile
      Caption         =   "&File"
      Begin VB.Menu mnuExit
         Caption         =   "E&xit"
      End
   End
   Begin VB.Menu mnuControl
      Caption         =   "&Control"
      Begin VB.Menu mnuStart
         Caption         =   "&Start"
      End
      Begin VB.Menu mnuDisplay
         Caption         =   "&Display"
      End
      Begin VB.Menu mnuFormat
         Caption         =   "&Format"
         Shortcut        =   ^F
      End
      Begin VB.Menu mnuSource
         Caption         =   "S&ource"
      End
      Begin VB.Menu mnuCompression
         Caption         =   "Co&mpression"
      End
      Begin VB.Menu mnuLine1
         Caption         =   "-"
      End
      Begin VB.Menu mnuPreview
         Caption         =   "&Preview"
         Checked         =   -1  'True
         Shortcut        =   ^P
      End
   End
Attribute VB_Name = "frmMain"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'* Author: E. J. Bantz Jr.
'* Copyright: None, use and distribute freely ...
'* E-Mail: [e-mail]
'* Web: http://www.inlink.com/~ejbantz
'* Original C Code Author: Neil Kolban
'* E-Mail: [e-mail]
'* Web: http://rampages.onramp.net/~kolban/video
Option Explicit
Dim lwndC As Long       ' Handle to the Capture Windows
Dim lNFrames As Long  ' Number of frames captured
Sub ResizeCaptureWindow(ByVal lwnd As Long)
    Dim CAPSTATUS As CAPSTATUS
    '// Get the capture window attributes .. width and height
    capGetStatus lwnd, VarPtr(CAPSTATUS), Len(CAPSTATUS)

    '// Resize the capture window to the capture sizes
    SetWindowPos lwnd, HWND_BOTTOM, 0, 0, _
                       CAPSTATUS.uiImageWidth, _
                       CAPSTATUS.uiImageHeight, _
                       SWP_NOMOVE Or SWP_NOZORDER

End Sub
Private Sub Form_Load()
    Dim lpszName As String * 100
    Dim lpszVer As String * 100
    Dim Caps As CAPDRIVERCAPS
    '//Create Capture Window
    capGetDriverDescriptionA 0, lpszName, 100, lpszVer, 100  '// Retrieves driver info
    lwndC = capCreateCaptureWindowA(lpszName, WS_CHILD Or WS_VISIBLE, 0, 0, 160, 120, Me.hwnd, 0)
    '// Connect the capture window to the driver
    capDriverConnect lwndC, 0
    '// Get the capabilities of the capture driver
    capDriverGetCaps lwndC, VarPtr(Caps), Len(Caps)
    '// If the capture driver does not support a dialog, grey it out
    '// in the menu bar.
    If Caps.fHasDlgVideoSource = 0 Then mnuSource.Enabled = False
    If Caps.fHasDlgVideoFormat = 0 Then mnuFormat.Enabled = False
    If Caps.fHasDlgVideoDisplay = 0 Then mnuDisplay.Enabled = False
    '// Set the video stream callback function
    capSetCallbackOnVideoStream lwndC, AddressOf MyVideoStreamCallback
    capSetCallbackOnFrame lwndC, AddressOf MyFrameCallback
    '// Set the preview rate in milliseconds
    capPreviewRate lwndC, 66
    '// Start previewing the image from the camera
    capPreview lwndC, True

    '// Resize the capture window to show the whole image
    ResizeCaptureWindow lwndC
End Sub
Private Sub Form_Unload(Cancel As Integer)
    '// Disable all callbacks
    capSetCallbackOnError lwndC, vbNull
    capSetCallbackOnStatus lwndC, vbNull
    capSetCallbackOnYield lwndC, vbNull
    capSetCallbackOnFrame lwndC, vbNull
    capSetCallbackOnVideoStream lwndC, vbNull
    capSetCallbackOnWaveStream lwndC, vbNull
    capSetCallbackOnCapControl lwndC, vbNull
End Sub
Private Sub mnuCompression_Click()
'   /*
'   * Display the Compression dialog when "Compression" is selected from
'   * the menu bar.
'   */
    capDlgVideoCompression lwndC
End Sub
Private Sub mnuDisplay_Click()
'   /*
'   * Display the Video Display dialog when "Display" is selected from
'   * the menu bar.
'   */
    capDlgVideoDisplay lwndC
End Sub
Private Sub mnuExit_Click()
    Unload Me
End Sub
Private Sub mnuFormat_Click()
'  /*
'   * Display the Video Format dialog when "Format" is selected from the
'   * menu bar.
'   */
    capDlgVideoFormat lwndC
    ResizeCaptureWindow lwndC
End Sub
Private Sub mnuPreview_Click()
    mnuPreview.Checked = Not (mnuPreview.Checked)
    capPreview lwndC, mnuPreview.Checked
End Sub
Private Sub mnuSource_Click()
'   /*
'    * Display the Video Source dialog when "Source" is selected from the
'    * menu bar.
'    */
    capDlgVideoSource lwndC
End Sub
Private Sub mnuStart_Click()
'  * If Start is selected from the menu, start Streaming capture.
'  * The streaming capture is terminated when the Escape key is pressed
'  */
    lNFrames = 0
    capCaptureSequenceNoFile lwndC
End Sub