Cryptdecode - MQL4

CryptDecode Function

**Overview** Performs the inverse transformation of data previously transformed by the CryptEncode() function.

**Signature**

int CryptDecode(
  ENUM_CRYPT_METHOD method,  // Transformation method
  const uchar&      data[],    // Source array
  const uchar&      key[],     // Key array
  uchar&            result[]   // Destination array
);

**Parameters**

method: [in] Specifies the data transformation method. Must be one of the values from the ENUM_CRYPT_METHOD enumeration.

data[]: [in] The source array containing the data to be decoded.

key[]: [in] The key array used for the decoding process.

result[]: [out] The destination array where the decoded data will be stored.

**Return Value** Returns the number of bytes written to the result array upon successful decoding. Returns 0 if an error occurs. To get specific error information, call the GetLastError() function.

**See Also**

CryptEncode()

GetLastError()

Array Functions

ENUM_CRYPT_METHOD (for available methods)

**Related Functions**

CryptEncode (for the forward transformation)

**Platform Support**

MQL4 Language

**Error Handling** Call GetLastError() after a return value of 0 to determine the cause of the error.