Pictures

Hi everyone, yet another question from me :)
I'm messing around bit with graphics and stuff, I got this:

Code:

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Dim TmpPictureBox as Picturebox

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Is there any way that I can use this picturebox for drawing? When i try to it gives all kind of nice errors :D
I want to do some drawing inside a function on such a picturebox and then return that picturebox's picture property. I hope I made myself clear and that anyone knows how to fix this.

-Shell-

Ok, i'll change the question.

I'm making a graphics file format (nothing serious, just playing around). I want to make a function where you input a filename and the function then returns a picture. Like this:

Code:

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Public Funtion OpenGraphicFile(sFileName as String) as picture

'Do drawing and loading stuff

End Function

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How can I make a picture with the right sizes (stored in the file) wich I can return with this function? I want to use the function like this:

Code:

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Picture1.picture = OpenGraphicFile("c:\test.grp")

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I know i'll have to use the createbitmap api and some other, but i have no clue on how to use those! Anyone please help me :)

Thanks in advance,

-Shell-

you could make a graphic format if you know some your binary open commands. And if you plan the structure of your format.

ill look into what your trying to do with the picture.

The PictureBox only supports certain formats so your function would have to return something that the control supports. Since that's the case, why go to all the trouble of developing your own file format. Also, for your first question, try this:

Dim TmpPictureBox as StdPicture

Hi,

What I want to do is:

Make a bitmap with given size in memory wich I can draw on using setpixelv and wich I can return from a function so it can be put in a picturebox.

-Shell-

Ok... i've been doing some trying and searching and i now have this:

Code:

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Dim MyDC As Long
Dim hBitmap As Long
Dim Pic As New StdPicture

Set Pic = LoadPicture("")

'Create a DC
MyDC = CreateCompatibleDC(GetDC(0))

'Create a bitmap
hBitmap = CreateCompatibleBitmap(GetDC(0), 32, 32)

'Select the bitmap in the DC
SelectObject MyDC, hBitmap

BitBlt MyDC, 0, 0, 32, 32, Picture1.hdc, 0, 0, SRCCOPY

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This creates a 32x32 image, now my question is: How can i put this picture into the stdPicture thing? I tried this: pic.handle = MyDC, but that wouldn't work. Anyone knows? Please help me!! :)

-Shell-

Here's a function create an stdPicture using the handle of a bitmap using the OleCreatePictureIndirect API

Code:

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Public Type GUID
   
    Data1 As Long
    Data2 As Integer
    Data3 As Integer
    Data4(7) As Byte

End Type

Public Type PicBmp
   
    Size As Long
    Type As Long
    hBmp As Long
    hPal As Long
    Reserved As Long

End Type

Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, iPic As IPicture) As Long

Private Function BitmapToStdPicture(hMemBmp As Long) As StdPicture

Dim InterfaceId As GUID
Dim Pic As PicBmp
Dim iPic As StdPicture

    With InterfaceId
       
        .Data1 = &H20400
        .Data4(0) = &HC0
        .Data4(7) = &H46
   
    End With
   
    With Pic
   
        .Size = Len(Pic)
        .Type = vbPicTypeBitmap
        .hBmp = hMemBmp
       
    End With
   
    OleCreatePictureIndirect Pic, InterfaceId, 1, iPic
    Set LoadMemoryBitmap = iPic
   
End Function

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