Scaling

[medleyj]

Does anybody know if there is a way to scale an image on a PictureBox control? Let me clarify this question a little bit. When the Control changes size, the image on the control also has to change size.

Thanks in advance.

[Iouri]

Try this

Picture1 is a picture box the size of your exisitng icon
picture 2 is a picture the size you want it to be

picture2.AutoRedraw is TRUE

you can easily use this to re-size icons, bitmaps, jpeg's etc - could put this in your code, but I would
use it to resize your icon once, then use the result

the result is always a bitmap though.

Option Explicit

Private Sub Command1_Click()

Dim retval As Long

retval = StretchBlt(Picture2.hdc, 0, 0, Picture2.Width \ 15, Picture2.Height \ 15, _
Picture1.hdc, 0, 0, Picture1.Width \ 15, Picture1.Height \ 15, SRCCOPY)

SavePicture Picture2.Image, "c:\newpic.bmp"

Picture2.Refresh

End Sub

'in a .bas

Option Explicit

Public Const SRCCOPY = &HCC0020


Declare Function StretchBlt Lib "gdi32.dll" (ByVal hdc 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 hSrcWidth As Long, ByVal nSrcHeight As Long, ByVal dwRop As Long) As Long


Declare Function BitBlt Lib "gdi32.dll" (ByVal hdcDest As Long, ByVal nXDest As Long, ByVal nYDest As
Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hdcSrc As Long, ByVal nXSrc As Long, ByVal
nYSrc As Long, ByVal dwRop As Long) As Long



Iouri Boutchkine
[email protected]