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save my own picture in file

Posted on 2001-06-11
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Last Modified: 2010-05-02
hi
as you know we can use BitBlt function to get capture from Dc to other Dc.
how i can save the new image whitch i capture it , to the file.
for examp:
Myret=bitblt(picture1.hdc,0,0,100,100,getdc(0),0,0,DropFlag)

when i write

SavePicture Picture1.Picture, "c:\mypic.bmp"

compiler say
thier is no picture

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Question by:issamtaher
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4 Comments
 
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Accepted Solution

by:
PaulHews earned 300 total points
ID: 6178864
Option Explicit
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC 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 dwRop As Long) As Long
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long

Private Sub Command1_Click()
    Dim myret As Long
    Picture1.AutoRedraw = True
    myret = BitBlt(Picture1.hDC, 0, 0, 100, 100, GetDC(0), 0, 0, vbSrcCopy)
    Debug.Print myret
    Picture1.Refresh
    SavePicture Picture1.Image, "C:\windows\desktop\test.bmp"
End Sub

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LVL 38

Expert Comment

by:PaulHews
ID: 6178911
The AutoRedraw is the important thing here.  It creates a persistent memory bitmap (necessary for valid picture object) when drawing operations are performed on the DC.
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Author Comment

by:issamtaher
ID: 6178914
thank you for heilping me
yours issam taher
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LVL 38

Expert Comment

by:PaulHews
ID: 6178940
You're welcome
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