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ID: 198
Viewed: 2885
Added: Apr 29, 2002
Version:
Snippet uploaded by: snippet
Written By: Clint LaFever
Demo: Sorry, no demo



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Class that allows the capturing of controls or forms by hWnd properties and saving as a .BMP.

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<!---Declaration--->
'------------------------------------------------------------ 
' Author: Clint LaFever [lafeverc@usa.net]
' Purpose: Allows screen captureing of controls/windows based on hWnd and save to a .BMP.
' Parameters:
' Example:
'------------------------------------------------------------
Option Explicit Private Const CCHDEVICENAME = 32
Private Const CCHFORMNAME = 32
Public FileName As String
Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Private Type DEVMODE
dmDeviceName As String * CCHDEVICENAME
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer
dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer
dmFormName As String * CCHFORMNAME
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type
Private Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long
Private Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function EmptyClipboard Lib "user32" () As Long
Private Declare Function SetClipboardData Lib "user32" (ByVal wFormat As Long, ByVal hMem As Long) As Long
Private Declare Function CloseClipboard Lib "user32" () As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Function CreateDC Lib "gdi32" Alias "CreateDCA" (ByVal lpDriverName As String, ByVal lpDeviceName As String, ByVal lpOutput As String, lpInitData As DEVMODE) As Long
Private Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hdc As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Sub ScrnCap(Lt, Top, Rt, Bot)
On Error GoTo ErrorScrnCap
Dim rWIDTH As Long, rHEIGHT As Long
Dim SourceDC As Long, DestDC As Long, bHANDLE As Long, Wnd As Long
Dim dHANDLE As Long, dm As DEVMODE
rWIDTH = Rt - Lt
rHEIGHT = Bot - Top
SourceDC = CreateDC("DISPLAY", 0&, 0&, dm)
DestDC = CreateCompatibleDC(SourceDC)
bHANDLE = CreateCompatibleBitmap(SourceDC, rWIDTH, rHEIGHT)
SelectObject DestDC, bHANDLE
BitBlt DestDC, 0, 0, rWIDTH, rHEIGHT, SourceDC, Lt, Top, &HCC0020
Wnd = Screen.ActiveForm.hwnd
OpenClipboard Wnd
EmptyClipboard
SetClipboardData 2, bHANDLE
CloseClipboard
DeleteDC DestDC
ReleaseDC dHANDLE, SourceDC
Exit Sub
ErrorScrnCap:
MsgBox Err & ":Error in ScrnCap(). Error Message:" & Err.Description, vbCritical, "Warning"
Exit Sub
End Sub
'------------------------------------------------------------
' Author: Clint LaFever [lafeverc@usa.net]
' Purpose: Captures a control/window based on hWnd and save to a .BMP.
' Parameters: hWnd=Control/Window to capture, fNAME=Save .BMP to...
' Example: obj.Capture lvLIST.hWnd,"TEST.BMP"
'------------------------------------------------------------
Public Sub Capture(control_hWnd As Long, Optional fNAME As String = "")
On Error GoTo ErrorCapture
Dim sp As RECT, x As Long
If fNAME = "" Then
fNAME = Me.FileName
Else
Me.FileName = fNAME
End If
If Me.FileName <> "" Then
x = GetWindowRect(control_hWnd, sp)
ScrnCap sp.Left, sp.Top, sp.Right, sp.Bottom
SavePicture Clipboard.GetData, Me.FileName
End If
Exit Sub
ErrorCapture:
MsgBox Err & ":Error in Caputre(). Error Message:" & Err.Description, vbCritical, "Warning"
Exit Sub
End Sub

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<!---Code--->
none;


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