Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
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Disk in drive A:
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Comparing file times
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Get the power status of your laptop computer
How to assemble an array of strings and pass it to external function
Retrieveing information about the active window (even if it is not owned by the calling process)
Retrieving information specific to the current Time Zone
URL: converting unsafe characters and spaces into escape sequences
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A client for testing non-blocking Winsock server
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Enumerating MIDI output devices
GDI+: retrieving list of available image encoders and image decoders
GetProcessVersion points at target OS
Basic Volume information

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See also:
  • Displaying the drive type value
  • Setting the volume label
  • Disk in drive A:
  • Obtaining physical parameters for a drive: sectors, clusters, cylinders...
  • #DEFINE FILE_CASE_SENSITIVE_SEARCH 1
    #DEFINE FILE_CASE_PRESERVED_NAMES 2
    #DEFINE FILE_UNICODE_ON_DISK 4
    #DEFINE FILE_PERSISTENT_ACLS 8
    #DEFINE FILE_FILE_COMPRESSION 16
    #DEFINE FILE_VOLUME_IS_COMPRESSED 0x8000
    #DEFINE MAX_PATH 260
    #DEFINE CRLF CHR(13)+CHR(10)
    
        DO declare
        DO GetVolumeInfo WITH "C:\"
    * end of main
    
    PROCEDURE GetVolumeInfo(cRoot As String)
        LOCAL cVolNameBuffer, nVolSerialNo, nMaxCompLen, nFlags, nError
    
        STORE REPLICATE(CHR(0),MAX_PATH) TO;
            cVolNameBuffer, nFilesysNameBuffer
    
        STORE 0 TO nVolSerialNo, nMaxCompLen, nFlags
    
        nResult = GetVolumeInformation(cRoot, @cVolNameBuffer,;
            MAX_PATH, @nVolSerialNo, @nMaxCompLen, @nFlags,;
            @nFilesysNameBuffer, MAX_PATH)
    
        IF nResult = 0
        * 3=ERROR_PATH_NOT_FOUND
        * 21=ERROR_NOT_READY
        * 87=ERROR_INVALID_PARAMETER
            nError = GetLastError()
            = MESSAGEBOX("GetVolumeInformation() call failed: " +;
                TRANSFORM(m.nError), 48, m.cRoot)
            RETURN
        ENDIF
    
        DO LogInfo WITH "Root", m.cRoot
    
        DO LogInfo WITH "File System Name",;
            LEFT(nFilesysNameBuffer, AT(CHR(0),nFilesysNameBuffer)-1)
    
        DO LogInfo WITH "Volume Name",;
            LEFT(cVolNameBuffer, AT(CHR(0),cVolNameBuffer)-1)
    
        DO LogInfo WITH "Volume Serial No.",;
            TRANSFORM(nVolSerialNo, "@0")
    
        DO LogInfo WITH "Max Filename Length", nMaxCompLen
    
        DO LogInfo WITH "File System Flags", TRANSFORM(nFlags, "@0")
    
        DO LogInfo WITH "Case-sensitive file names support",;
            IIF(BITAND(nFlags, FILE_CASE_SENSITIVE_SEARCH)=0, "No", "Yes")
    
        DO LogInfo WITH "The file system preserves the case of file names",;
            IIF(BITAND(nFlags, FILE_CASE_PRESERVED_NAMES)=0, "No", "Yes")
    
        DO LogInfo WITH "Unicode in file names support",;
            IIF(BITAND(nFlags, FILE_UNICODE_ON_DISK)=0, "No", "Yes")
    
        DO LogInfo WITH "ACLs support",;
            IIF(BITAND(nFlags, FILE_PERSISTENT_ACLS)=0, "No", "Yes")
    
        DO LogInfo WITH "File-based compression support",;
            IIF(BITAND(nFlags, FILE_FILE_COMPRESSION)=0, "No", "Yes")
    
        DO LogInfo WITH "The specified volume is a compressed volume",;
            IIF(BITAND(nFlags, FILE_VOLUME_IS_COMPRESSED)=0, "No", "Yes")
    
        IF USED("csResult")
            SELECT csResult
            GO TOP
            BROWSE NORMAL NOWAIT
        ENDIF
    
    PROCEDURE LogInfo(cName, vValue)
        IF NOT USED("csResult")
            CREATE CURSOR csResult (property_name C(50), property_value C(50))
        ENDIF
    
        INSERT INTO csResult (property_name, property_value);
        VALUES (m.cName, TRANSFORM(m.vValue))
    
    PROCEDURE declare
        DECLARE INTEGER GetLastError IN kernel32
    
        DECLARE SHORT GetVolumeInformation IN kernel32;
            STRING lpRootPathName, STRING @lpVolumeNameBuffer,;
            LONG nVolumeNameSize, LONG @lpVolumeSerialNumber,;
            LONG @lpMaximumComponentLength, LONG @lpFlags,;
            STRING @lpFileSystemNameBuffer, LONG nFilesysNameSize
    
    

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    2754 bytes  
    Created: 2001-08-10 12:00:00  
    Modified: 2009-02-16 14:55:10  
    Visits in 7 days: 24  
    Listed functions:
    GetLastError
    GetVolumeInformation
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