DeleteVolumeMountPoint() - Unmount the disk from a folder

 

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Target platform: none, just for learning

Header file: Standard and Windows

Additional library: Windows Platform SDK

Additional project setting: Set project to be compiled as C

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C Code (/TC)

Other info: non-CLR or unmanaged

To do: Unmount the logical drive from a folder

To show: Using the DeleteVolumeMountPoint() C function

 

// Unmounting disk or tape to a drive or folder...

#define _WIN32_WINNT 0x0501

#include <windows.h>

#include <stdio.h>

 

// Run at the command prompt, all based on the wide character/unicode program...

int wmain(int argc, wchar_t *argv[])

{

BOOL bFlag;

 

// If the argument for the mount point is not given...

if(argc != 2)

{

printf("%S command unmounts a volume from the volume mount point.\n", argv[0]);

printf("Usage: \"%S <the_mount_point>\n", argv[0]);

printf("Example: \"%S c:\\mymnt\\gdrive\\\"\n", argv[0]);

// Just exit

return (1);

}

 

// Do some verification, error checking. The argv[1] is a path of the volume mount point

bFlag = DeleteVolumeMountPoint(argv[1]);

if(!bFlag)

{

printf("Unmounting the volume at %S failed!\n", argv[1]);

exit(2);

}

else

printf("Unmounting the volume at %S successfully done!\n", argv[1]);

return (bFlag);

}

 

Output example:

(This program run at the command prompt)

 

F:\vc2005project\cplus\debug>cplus

cplus command unmounts a volume from the volume mount point.

Usage: "cplus <the_mount_point>

Example: "cplus c:\mymnt\gdrive\"

 

F:\vc2005project\cplus\debug>cplus C:\mymount\

Unmounting the volume at C:\mymount\ successfully done!

 

F:\vc2005project\cplus\debug>

 

 

Note:

String Data Type ------------ String Literal

------------------------------------------------

char - standard/ANSI--------"string"

TCHAR - generic--------------TEXT("string")

WCHAR/Unicode--------------L"string"

 

 

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