PictureBox

I m using PictureBox Control
and want to load picture from internet address.
http://www.google.com.br/intl/pt-BR_br/images/logo.gif
how to load it .....???



** dont advice me to use Web Browser Control :)


thx in Advance

Why don't you download the picture first?

Use an API to download the file and then LoadPicture display it in the PictureBox.

Or use a function returning an StdPicture type as I have done below.

Code:

---

Private Declare Function URLDownloadToFile Lib "urlmon" Alias "URLDownloadToFileA" _
  (ByVal pCaller As Long, _
  ByVal szURL As String, _
  ByVal szFileName As String, _
  ByVal dwReserved As Long, _
  ByVal lpfnCB As Long) _
  As Long

Private Function DownloadImage(ByVal pstrImageURL as String, ByVal pstrLocalFile As String) as StdPicture
  Dim lngRetVal    As Long
 
  URLDownloadToFile 0&, pstrImageURL, pstrLocalFile, 0&, 0&
 
  If (Not lngRetVal) Then
    DownloadImage = LoadPicture(pstrLocalFile)
   
    Else
    MsgBox "The remote file could not be downloaded"
   
  End If
End Function

' To load into a picturebox use this code
Picture1.Image = DownloadImage([URL], [Tempfilename])

' after that you can kill the local file if you wish

---

Quote:

---

Originally Posted by penagate

Use an API to download the file and then LoadPicture display it in the PictureBox.

Or use a function returning an StdPicture type as I have done below.

Code:

---

Private Declare Function URLDownloadToFile Lib "urlmon" Alias "URLDownloadToFileA" _
  (ByVal pCaller As Long, _
  ByVal szURL As String, _
  ByVal szFileName As String, _
  ByVal dwReserved As Long, _
  ByVal lpfnCB As Long) _
  As Long

Private Function DownloadImage(ByVal pstrImageURL as String, ByVal pstrLocalFile As String) as StdPicture
  Dim lngRetVal    As Long
 
  URLDownloadToFile 0&, pstrImageURL, pstrLocalFile, 0&, 0&
 
  If (Not lngRetVal) Then
    DownloadImage = LoadPicture(pstrLocalFile)
   
    Else
    MsgBox "The remote file could not be downloaded"
   
  End If
End Function

' To load into a picturebox use this code
Picture1.Image = DownloadImage([URL], [Tempfilename])

' after that you can kill the local file if you wish

---

---

sorry but second last line is not working .....

Sorry, it should be
Set DownloadImage = LoadPicture etc.

y we have to use "set"

..?

Set is used when assigning an object reference to a variable. In this case we need to use Set when returning the function as it is an object reference. If it was just a string or long integer then there would be no need because it would just be a straight value.

Generally, when you use Set to assign an object reference to a variable, no copy of the object is created for that variable. The Dim, Private, Public, or ReDim statements only declare a variable that refers to an object. No actual object is referred to until you use the Set statement to assign a specific object.

Set is used to set a reference to a control in the variable. This example will explain the difference

VB Code:

Dim myVar As Variant
 
myVar = Text1
'The line above will save the Text1.Text contents in the variable. This is 
'because Text is the default property. 
 
Set myVar = Text1
'The line above will save the reference to the TextBox into the variable. You 
'could use the Text, Tag, etc. later (by doing myVar.Text, myVar.Tag, etc).
'This is because myVar is a "pointer to the object".

By the way, in .Net there's no default property... so the Set keyword does not exist because you don't have to differenciate one way or the other.

Quote:

---

Originally Posted by penagate

Set is used when assigning an object reference to a variable. In this case we need to use Set when returning the function as it is an object reference. If it was just a string or long integer then there would be no need because it would just be a straight value.

---

Then y v not use it with
Picture1.picture= loadpicture("c:\something.bmp")


like
set picture1.picture=loadpicture("c:\something.bmp")

because as i know
loadpicture function does not point towards path of the picture
but instead make copy of picture in memory ...
that is why i asked about "SET" ... with
picture1.picture = etc

why not?:

Picture1.picture = loadpicture("http://www.google.com.br/intl/pt-BR_br/images/logo.gif")

OOPs i didn't understand it ..
I was asking about usage of "Set"
that y we do not use it with loadpicture function because it also specifes to object of picture..
_____
"SET" | picture1.picture=loadpicture("Any Path")
____