* should be no trouble with this one

DECLARE INTEGER ftrScanOpenDevice IN ftrScanAPI.dll

* should be no trouble with this one

DECLARE ftrScanCloseDevice IN ftrScanAPI.dll INTEGER ftrHandle

* should be no trouble with this one

DECLARE INTEGER ftrScanSetDiodesStatus IN ftrScanAPI.dll INTEGER ftrHandle, INTEGER byGreenDiodeStatus, INTEGER byRedDiodeStatus

* should be no trouble with this one

DECLARE INTEGER ftrScanGetDiodesStatus IN ftrScanAPI.dll INTEGER ftrHandle, INTEGER @ pbIsGreenDiodeOn, INTEGER @ pbIsRedDiodeOn

* For pImageSize, pass to the ftrScanGetImageSize a string equal to REPLICATE(CHR(0), 12). 12 means 3 INTEGERs, 4 bytes each.
* After the function returns, you'll need to parse the pImageSize and convert it to 3 numeric values. The last one you'll need for subsequent
ftrScanGetImage call

DECLARE INTEGER ftrScanGetImageSize IN ftrScanAPI.dll INTEGER ftrHandle, STRING @ pImageSize

* Prior to calling ftrScanGetImage, you have to allocate pBuffer -- VFP string of a sufficient size returned by a call to ftrScanGetImageSize.
* After the function returns, the string will be populated with required bytes.

DECLARE INTEGER ftrScanGetImage IN ftrScanAPI.dll INTEGER ftrHandle, INTEGER nDose, STRING @ pBuffer