I installed Visual c++ and started dumpbin as you suggested. This is the output: 
Dump of file c:\Programme\HCE300B_APP\ApiLib\HCE300_API.dll

File Type: DLL

  Section contains the following exports for HCE300_API.dll

    00000000 characteristics
           0 time date stamp Thu Jan 01 01:00:00 1970
        0.00 version
           1 ordinal base
          14 number of functions
          14 number of names

    ordinal hint RVA      name

          5    0 0005A51C HCE300_Break
         13    1 0005B148 HCE300_Close
          3    2 0005A514 HCE300_GetDeviceType
          9    3 0005AFD8 HCE300_GetLastStatus
          1    4 0005B2C8 HCE300_GetRecordFormat
          2    5 0005B260 HCE300_GetTrack2Density
         14    6 0005A52C HCE300_Open
         11    7 0005A854 HCE300_Read
         12    8 0005B174 HCE300_Reset
          4    9 0005A4F0 HCE300_SetDeviceType
          7    A 0005B268 HCE300_SetRecordFormat
          6    B 0005A4D0 HCE300_SetShowDialog
          8    C 0005B200 HCE300_SetTrack2Density
         10    D 0005AC5C HCE300_Write

  Summary

        1000 .edata
        3000 .idata
        6000 .reloc
       1A000 .rsrc
        2000 BSS
       5B000 CODE
        2000 DATA

[download]
I also found some more C sample code: 
char ReadBuf[250];
/* Open Success */
if(HCE300_Read(2, ReadBuf) == HCE300_OK) {

}
else {

}

[download]
(I removed the unreadable chinese comments from the sample)

In reply to Re^6: Correct call for dll with Win32::API by walto
in thread Correct call for dll with Win32::API by walto

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