You can't a .JPEG is a photo or image file while a .MP3 is a music or audio file.
Wpostx is the format used by Windows Live Writer. As such it is a text format which does not lend itself to conversion to a bitmap image format such as JPEG.
You can find accurate information about JPEG compression and JPEG/EXIF file format in wikipedia - see related link.If you are looking to write programs supporting the JPEG/EXIF file format you should have a look at jpeglib - see related link.
CorelDraw files (.CDR) use a is a vector format, And the Jpeg is raster. You can import the jpeg into CorelDraw and then "Save As" .CDR
You must be mistaken, first its jpeg, which is a graphic file, and wma is a audio file. You can't convert jpeg to wma.
The term "JPEG" is the acronym for the Joint Photographic Experts Group. Its the file format for pictures
Audio Interchange File Format was created on 1988-01-21.
The "Open with" window gives you the option of selecting which program to use to open the file you have selected. jpeg is not listed because jpeg is a file format, not a program. If you clicked on a jpeg file and got an "Open with" selection window, you want to select a program that handles jpeg's, such as MS Paint, Paint Shop Pro, or Photoshop.
JPEG file format which have .jpg or .jpeg extension at the end of file name.
a PHAT file
TIFF File
mp3 file format