A Little more help with DllCall / Data Types Topic is solved

[Cuadrix]

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BOOL CryptVerifyMessageHash(
  PCRYPT_HASH_MESSAGE_PARA pHashPara,
  BYTE                     *pbHashedBlob,
  DWORD                    cbHashedBlob,
  BYTE                     *pbToBeHashed,
  DWORD                    *pcbToBeHashed,
  BYTE                     *pbComputedHash,
  DWORD                    *pcbComputedHash
);

Autohotkey type for BYTE is UChar. Since the above; BYTE *pbHashedBlob is a pointer to a BYTE, do I just append the suffix * or P to UChar ?

Like UCharP

What about a pointer to a userdefined type with an asetisk?;

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PVOID VirtualAlloc2FromApp(
  HANDLE                 Process,
  PVOID                  BaseAddress,
  SIZE_T                 Size,
  ULONG                  AllocationType,
  ULONG                  PageProtection,
  MEM_EXTENDED_PARAMETER *ExtendedParameters,
  ULONG                  ParameterCount
);

For the above; MEM_EXTENDED_PARAMETER *ExtendedParameters do I use PtrP or just Ptr ?

And lastly for now; What about const void* or any other const * ?

Trying to better my understanding on this.

[just me]

CryptVerifyMessageHash:

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  BYTE                     *pbHashedBlob,

In this case, *pbHashedBlob seems to be a pointer to an array of BYTE/UChars. That's why Ptr fits best.

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DllCall("Crypt32.dll\CryptVerifyMessageHash2, "Ptr", pHashPara, "Ptr", pbHashedBlob, ...)

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  DWORD                    *pcbToBeHashed,

In this case *pcbToBeHashed is a pointer to a DWORD/UInt specifying the size of pbToBeHashed in bytes. If the function writes to pbToBeHashed it updates the value the pointer points to. If you use the * or P suffix, AHK will update the contents of the used variable automatically.

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DllCall("Crypt32.dll\CryptVerifyMessageHash2, "Ptr", pHashPara, "Ptr", pbHashedBlob, "UIntP", cbToBeHashed, ...

[just me]

VirtualAlloc2FromApp:

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  MEM_EXTENDED_PARAMETER *ExtendedParameters,

An optional pointer to one or more extended parameters of type MEM_EXTENDED_PARAMETER.

So it's also a pointer to an array -> Ptr.