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Luc found a problem with the HowTo Use the LoadImage API function to antialias an image. The code successfully loads an image into a PictureBox but you cannot assign the PictureBox's Picture property to another control's Picture property. I still don't know exactly why this is true but here's a workaround.
Rather than assigning the loaded image directly to the PictureBox, the program loads it into a memory temporary context and then uses BitBlt to copy the result into the PictureBox. Setting pic.Picture = pic.Image at the end makes the picture permanent. For example, if you use pic.Cls after this, the picture remains.
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' Use LoadImage to load the picture.
Private Sub LoadWithLoadImage(ByVal pic As PictureBox, _
ByVal file_name As String)
Dim hbm As Long
Dim wid As Long
Dim hgt As Long
Dim temp_dc As Long
' Load the image using LoadImage.
wid = pic.ScaleX(pic.ScaleWidth, pic.ScaleMode, _
vbPixels)
hgt = pic.ScaleY(pic.ScaleHeight, pic.ScaleMode, _
vbPixels)
hbm = LoadImage(ByVal 0&, file_name, _
IMAGE_BITMAP, wid, hgt, &H10)
' Make a device context to hold the picture.
temp_dc = CreateCompatibleDC(0)
SelectObject temp_dc, hbm
' Copy the picture into the PictureBox.
BitBlt pic.hdc, 0, 0, wid, hgt, temp_dc, 0, 0, SRCCOPY
' Delete the DC and bitmap.
DeleteDC temp_dc
DeleteObject hbm
' Make the image permanent.
pic.Picture = pic.Image
End Sub
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