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DIB to System.Bitmap

, 6 Nov 2006
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An article on DIB to Bitmap conversion.


This article describes a way to retrieve an image from a DIB handle to a System.Bitmap object.

I am developing a TWAIN scanning solution for my enterprise. I have developed code for scanning an image. The only problem  was that after an image is scanned, the scanned image is available in memory in DIB format and all I am having is an IntPtr pointing to the DIB image.

My purpose is to retrieve the scanned image from the DIB handle and show it in a picture box. For that, I need to convert the DIB handle into a Bitmap object. The following code shows how I solved this problem.

Using the code

Here is a code for the function BitmapFromDIB which will return you a Bitmap object from the DIB handle.

This function accepts two parameters

  • pDIB: it is a pointer to a DIB which is returned after scanning an image
  • pPix: it is a pointer to DIBpixels

Here, we have used the function GdipCreateBitmapFromGdiDib exported from Gdiplus.dll to get a pointer to a Bitmap. We then use reflection, and pass this pointer to the static internal method Bitmap.FromGDIplus(IntPtr pGdiBitmap).

using System.Drawing; 
using System.Reflection; // . . . 

   CharSet=CharSet.Unicode, ExactSpelling=true)] 
private static extern int GdipCreateBitmapFromGdiDib(IntPtr pBIH, 
                          IntPtr pPix, out IntPtr pBitmap); 

public static Bitmap BitmapFromDIB(IntPtr pDIB,IntPtr pPix) 

    MethodInfo mi = typeof(Bitmap).GetMethod("FromGDIplus", 
                    BindingFlags.Static | BindingFlags.NonPublic); 

    if (mi == null) 
        return null; // (permission problem) 

    IntPtr pBmp = IntPtr.Zero; 
    int status = GdipCreateBitmapFromGdiDib(pDIB, pPix, out pBmp); 

    if ((status == 0) && (pBmp != IntPtr.Zero)) // success 
        return (Bitmap)mi.Invoke(null, new object[] {pBmp}); 

        return null; // failure 


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About the Author

Software Developer Microsoft
United States United States
No Biography provided

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Comments and Discussions

QuestionPointer Pin
stixoffire6-Nov-14 9:23
memberstixoffire6-Nov-14 9:23 
GeneralGreat article Pin
Lee.21-Jul-13 15:48
memberLee.21-Jul-13 15:48 
Questionthank you Pin
kevingif3-Mar-13 23:05
memberkevingif3-Mar-13 23:05 
QuestionAssume this is public domain or is there any license? Pin
sbarnes18-Sep-12 9:06
membersbarnes18-Sep-12 9:06 
QuestionHow to convert a bitmap to dib handle ? Pin
vbilici26-Jun-12 3:54
membervbilici26-Jun-12 3:54 
Questiontnx Pin
Mojtaba Candovani5-Mar-12 7:57
memberMojtaba Candovani5-Mar-12 7:57 
GeneralCreating Bitmap from DIB Pin
a.stacchetti.ibed27-Apr-11 4:19
membera.stacchetti.ibed27-Apr-11 4:19 
GeneralCreating Bitmap from DIB without PInvoke (Code inside) Pin
Renegade223-Jun-08 22:24
memberRenegade223-Jun-08 22:24 
GeneralRe: Creating Bitmap from DIB without PInvoke (Code inside) Pin
samorim4-Sep-08 14:31
membersamorim4-Sep-08 14:31 
GeneralRe: Creating Bitmap from DIB without PInvoke (Code inside) Pin
bijulsoni4-Sep-08 20:55
memberbijulsoni4-Sep-08 20:55 

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