I have a problem with the bitmap generated from a 2D drawing (.slddrw) using GetPreviewBitmapFile. The image is generated with unnecessary white margins. It doesn't trim the drawing correctly. The issue occurs only with the width, while the height is trimmed properly. I use the generated bitmap to preview the drawing in the Image window in a form that I created. Below, I am attaching photos and a code snippet responsible for generating the preview. 

Do you have any ideas on how to fix this?

Here are the bitmaps generated by SolidWorks (You need to click and open the image because in this view, the forum background blends with the white margins of the bitmap):

Here is the part of the code responsible for the preview:

Private Sub ShowPreview(drawingPath As String)
   On Error GoTo ErrorHandler
   
   Debug.Print "Rozpoczynam generowanie podglądu dla: " & drawingPath
   
     Dim previewPicture As stdole.StdPicture
   Set previewPicture = swApp.GetPreviewBitmap(drawingPath, "")
   
   If previewPicture Is Nothing Then
       Debug.Print "Nie udało się uzyskać podglądu!"
       Exit Sub
   End If
   
   Debug.Print "Uzyskano podgląd:"
   Debug.Print "Szerokość: " & previewPicture.Width
   Debug.Print "Wysokość: " & previewPicture.Height
   
  
   Dim tempPath As String
   tempPath = Left(drawingPath, InStrRev(drawingPath, "\")) & "preview.bmp"
   SavePicture previewPicture, tempPath
   Debug.Print "Zapisano podgląd do: " & tempPath
   
  
  With PreviewImage
   .PictureSizeMode = fmPictureSizeModeZoom
   .Picture = previewPicture
End With
   
   Exit Sub
   
ErrorHandler:
   Debug.Print "Błąd podczas generowania podglądu: " & Err.Description
   Set PreviewImage.Picture = Nothing
End Sub