Visual Basic 6 Image conversion from GIF to JPG or TIF

Question

Language Visual Basic 6.

I want to know if there is an open source or existing Microsoft Image library that will allow me to convert a GIF (8 Bit Depth) image to ei

Answer 1

I've using this method using Intel's JPEG library. It will help you save your PictureBox as a JPEG. I am using this method in a production application and it works great.

Answer 2

You might consider Windows® Image Acquisition Automation Library v2.0 Tool: Image acquisition and manipulation component for VB and scripting. There are plenty of examples of using it for image conversion, Google should turn up quite a few.

Answer 3

ImageMagick is an excellent free open source image manipulation package. There is an OLE (ActiveX) control which you could use from VB6. I've never tried it myself - I always use the ImageMagick command line. I understand the control just takes the normal command lines anyway.

The conversion command for gif to jpg would be something like this.

convert my.gif my.jpg

EDIT: ImageMagick is licensed under the GPL: if you use the control and redistribute your program, it's possible your program would have to be free open-source. Apparently it's not yet been legally tested whether dynamic linking to a GPL library or control invokes the GPL. You could always launch the ImageMagick command-line which to me should be safe [I am not a lawyer].

Answer 4

I've been using this awesome code for 6 years with never a problem

Answer 5

Use GDIPlus library! It's Windows's standart library.
It converts to JPG , BMP , ICO and even to PNG, Transparent PNG and so on...
Try googling Convert images using GDIPlus library.