Книга: Microsoft Windows Embedded CE 6.0 Exam Preparation Kit

File System Files

File System Files

File system (.dat) files, specifically Platform.dat and Project.dat, contain settings to initialize the RAM file system. When you cold start the run-time image on a target device, Filesys.exe processes these .dat files to create the RAM file system directories, files, and links on the target device. The Platform.dat file is typically used for hardware-related entries while the Project.dat file applies to the OS design, yet you can use any existing .dat file to define file system settings because the build system eventually merges all .dat files into one file named Initobj.dat.

For example, by customizing the Project.dat file, you can define root directories in addition to the Windows directory for a run-time image. By default, items placed in the ROM image appear in the Windows directory, yet by using a .dat file, you can make files also appear outside the Windows directory. You can also copy or link to files in the ROM Windows directory. This is particularly useful if you want to place shortcuts on the desktop or add links to your applications to the Start menu. Similar to .reg and .bib files, you can use IF and IF ! (if not) conditional blocks in .dat files.

The following listing illustrates how to use a Project.dat file to create two new root directories named Program Files and My Documents, create a My Projects subdirectory under Program Files, and map the Myfile.doc file from the Windows directory into the My Documents directory.

Root:-Directory("Program Files")
Root:-Directory("My Documents")
Directory("Program Files"):-Directory("My Projects")
Directory("My Documents"):-File("MyFile.doc", "WindowsMyfile.doc")

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