hDC to stdPicture

[quadratic]

How can I do to create stdPicture object from a specified device context. For example I have a picture box, then I draw something on it. please help me to create a stdole.stdPicture object from this picturebox that I can use it to load on other picture box by method picture2.picture = mvStdPicture. Thanks a lot.

[Zaei]

You can do:

picture2.picture = myPicture.image

... unless you have some other specific reason for creating an stdPicture object.

Z.

[Janus]

Try out Benjamin Marty's CapturePicture function, it creates an StdPicture from a specified area of any hDC.

It might be included in a module of this PSC post:
http://www.planet-source-code.com/vb...29762&lngWId=1
Or in the source of his open source game toolkit:
http://gamedev.sourceforge.net/

When I get home I'll try and remember to find the function and post it here.

[Janus]

'
'
' GDI Image Tools (v1.0)
' Copyright 2001, Kevin Gadd & Benjamin Marty
' You are free to use this code in your own applications, and reproduce it on web pages,
' Provided you leave this header intact.
'
'
Option Explicit

Public Type GITRect
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

Public Type iid
x As Long
s1 As Integer
s2 As Integer
c(0 To 7) As Byte
End Type

Public Type PICTDESC
cbSizeOfStruct As Long
picType As Long
hBitmap As Long
hPal As Long
End Type

Public Type BITMAPINFOHEADER '40 bytes
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type

Public Type RGBQUAD
RGBBlue As Byte
RGBGreen As Byte
RGBRed As Byte
rgbReserved As Byte
End Type

Public Type RGBTRIPLE
rgbtBlue As Byte
rgbtGreen As Byte
rgbtRed As Byte
End Type

Public Type BITMAPINFO
bmiHeader As BITMAPINFOHEADER
bmiColors As RGBQUAD
End Type

Public Const DIB_RGB_COLORS = 0
Public Const BI_RGB = 0&
Public Const OBJ_PAL = 5
Public Const BLACK_BRUSH = 4
Public Const S_OK = &H0

Public Enum picType ' IPictureDisp.Type
PICTYPE_UNINITIALIZED = -1
PICTYPE_NONE = 0
PICTYPE_BITMAP = 1
PICTYPE_METAFILE = 2
PICTYPE_ICON = 3
PICTYPE_ENHMETAFILE = 4
End Enum

Public Declare Function GetCurrentObject Lib "gdi32" (ByVal hDC As Long, ByVal uObjectType As Long) As Long
Public Declare Function GetStockObject Lib "gdi32" (ByVal nIndex As Long) As Long
Public Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long
Public Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Public Declare Function FillRect Lib "user32" (ByVal hDC As Long, lpRect As GITRect, ByVal hBrush As Long) As Long
Public 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
Public Declare Function SelectObject Lib "gdi32" (ByVal hDC As Long, ByVal hObject As Long) As Long
Public Declare Function OleCreatePictureIndirect Lib "olepro32" (ByRef pPictDesc As PICTDESC, ByRef riid As iid, ByVal fOwn As Boolean, ByRef ppvObj As StdPicture) As Long
Public Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hDC As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Public Declare Function DeleteDC Lib "gdi32" (ByVal hDC As Long) As Long
Public Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hDC As Long) As Long
Public Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function GetDesktopWindow Lib "user32" () As Long
Public Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hDC As Long) As Long

' Written by Benjamin Marty
Public Function CapturePicture(ByVal hDC As Long, ByVal Left As Long, ByVal Top As Long, ByVal Width As Long, ByVal Height As Long) As IPictureDisp
Dim picGuid As iid
Dim picDesc As PICTDESC
Dim hdcMem As Long
Dim hBmp As Long
Dim hOldBmp As Long
Dim Pic As IPictureDisp
Dim rcBitmap As GITRect

' IID_IPictureDisp
picGuid.x = &H7BF80981
picGuid.s1 = &HBF32
picGuid.s2 = &H101A
picGuid.c(0) = &H8B
picGuid.c(1) = &HBB
picGuid.c(2) = &H0
picGuid.c(3) = &HAA
picGuid.c(4) = &H0
picGuid.c(5) = &H30
picGuid.c(6) = &HC
picGuid.c(7) = &HAB

picDesc.cbSizeOfStruct = Len(picDesc)
hdcMem = CreateCompatibleDC(hDC)
If hdcMem = 0 Then
Exit Function
End If
hBmp = CreateCompatibleBitmap(hDC, Width, Height)
If hBmp = 0 Then
DeleteDC hdcMem
Exit Function
End If
hOldBmp = SelectObject(hdcMem, hBmp)
If Left >= 0 And Top >= 0 Then
If BitBlt(hdcMem, 0, 0, Width, Height, hDC, Left, Top, vbSrcCopy) = 0 Then
SelectObject hdcMem, hOldBmp
DeleteDC hdcMem
DeleteObject hBmp
Exit Function
End If
Else
With rcBitmap
.Left = 0
.Top = 0
.Right = Width
.Bottom = Height
End With
FillRect hdcMem, rcBitmap, GetStockObject(BLACK_BRUSH)
End If
SelectObject hdcMem, hOldBmp
picDesc.hBitmap = hBmp
picDesc.hPal = GetCurrentObject(hDC, OBJ_PAL)
picDesc.picType = PICTYPE_BITMAP
If OleCreatePictureIndirect(picDesc, picGuid, True, Pic) <> S_OK Then
DeleteDC hdcMem
DeleteObject hBmp
Exit Function
End If
Set CapturePicture = Pic
Set Pic = Nothing
DeleteDC hdcMem
End Function