C++ DLL 包装器 vb.net 传递字节数组的字节数组?

我正在调用一个函数，但我陷入了我必须传递的论点：

这就是我得到的。

函数定义：

DWORD  dllexp_SetLedData(PBYTE bytArray, int arySize)

这是来自 SDK 的：

参数

姓名 |类型 |描述

字节阵列 |输入 |指向从 LED 设置转换的字节数组的指针 结构数组。
ary大小 |输入 |由 bytArray 指示的缓冲区的大小(以字节为单位)。

返回值值
|描述

ERROR_SUCCESS(0x0) |成功
ERROR_INVALID_OPERATION(0x10DD) |失败

VB.NET

<DllImport("GLedApi.dll", setLastError:=False, callingConvention:=CallingConvention.Cdecl)> _
Public Shared Function dllexp_SetLedData(bytArray As Byte(), arySize As Int32) As Integer
End Function

C++中LED设置的结构

typedef struct tagLedSettingData {
BYTE Reserve0;
BYTE Mode_Sel;           //LED Mode
BYTE MaxBrightness;      //default set to 100
BYTE MinBrightness;      //defautl set to 0
DWORD dwColor;          //0xWWRRGGBB, WW:0 -> WLED turn off, WW:0xFF -> WLED turn on
WORD wTime_base0;      //light on time, in millisecond
WORD wTime_base1;      //Interval time, in millisecond
WORD wTime_base2;      //Cycle time, light on + light off <= Cycle time, this for Flash mode only
BYTE CtrlVal0;
BYTE CtrlVal1;
} LedSettingData, *LedSettingData_Ptr;

我在 vb.net 写的结构

Public Structure GLEDSETTINGS
Public Sub New(LedMod1 As ModeSelOptions, MaxB As Byte, MinB As Byte, dwColor1 As UInteger, aWtime0 As UShort, _
awtime1 As UShort, awtime2 As UShort, actrlVal0 As Byte, actrlVal1 As Byte)
Reserved0 = &H0
LedMod = LedMod1
MaxBrightness = MaxB
MinBrightness = MinB
dwColor = dwColor1
wTime0 = aWtime0
wTime1 = awtime1
wTime2 = awtime2
CtrlVal0 = actrlVal0
CtrlVal1 = actrlVal1
End Sub
Private Reserved0 As Byte
Public LedMod As ModeSelOptions
Public MaxBrightness As Byte  ' max 100
Public MinBrightness As Byte
Public dwColor As UInteger  ' &h0FFFFFF
Public wTime0 As UShort
Public wTime1 As UShort
Public wTime2 As UShort
Public CtrlVal0 As Byte
Public CtrlVal1 As Byte
Public Enum ModeSelOptions As Byte
Defecto = 0
Pulse
Music
ColorCycle
Statico
Flash
Transition
DigiModA
DigiModB
DigiModC
DigiModD
DigiModE
DigiModF
DigiModG
DigiModH
DigiModi
End Enum
Public Enum LedType As Integer
NA
A_LED
D_LED_TYPE1
D_LED_TYPE2
End Enum
Function ToByteArray() As Byte()
Dim size As Integer = Marshal.SizeOf(Me)
Dim arr As Byte() = New Byte(size - 1) {}
Dim ptr As IntPtr = Marshal.AllocHGlobal(size)
Marshal.StructureToPtr(Me, ptr, True)
Marshal.Copy(ptr, arr, 0, size)
Marshal.FreeHGlobal(ptr)
Return arr
End Function
End Structure

到目前为止，一切顺利，但是...我认为该函数需要一个字节数组数组。但我不知道如何在 vb.net 中做到这一点。

我唯一能做的就是：

Dim LD(iMaxDivs - 1) As GLEDSETTINGS
For I = 0 To iMaxDivs - 1
Dim L As New GLEDSETTINGS(GLEDSETTINGS.ModeSelOptions.Statico, 100, 0, &HFFFF11FFUI, 1000, 100, 0, &H0, &H0)
LD(I) = L

Next
'Dim LDParam(LDTama) As Byte
Dim LDTbrr As Byte() = LD(0).ToByteArray
Dim LDTama As Integer = Marshal.SizeOf(LD(0))

resp3 = GLed.dllexp_SetLedData(LDTbrr, LDTama)
Debug.WriteLine("SetLedData: " & resp3)
If resp3 = GLed.ERROR_INVALID_OPERATION Then
Exit Sub
End If

而且我没有收到错误，但是ERROR_INVALID_OPERATION

我转换字节数组中的结构。 在我的结构中使用ToByteArray函数，可以正常工作，但我无法将此数组放入字节数组中，例如：不允许dim Array(10) as Byte()。

我在 SDK 中看到了这一点C++我正在使用的 DLL 的示例中。 但我无法将其"翻译"为 vb.net。

pSettingData = new LedSettingData[iMaxDivs];
int dLen = iMaxDivs * sizeof(LedSettingData);
//ZeroMemory(pSettingData, dLen);
for (int i = 0; i < iMaxDivs; i++)
{
(pSettingData + i)->Mode_Sel = sd.Mode_Sel;
(pSettingData + i)->MaxBrightness = sd.MaxBrightness;
(pSettingData + i)->MinBrightness = sd.MinBrightness;
(pSettingData + i)->dwColor = sd.dwColor;
(pSettingData + i)->wTime_base0 = sd.wTime_base0;
(pSettingData + i)->wTime_base1 = sd.wTime_base1;
(pSettingData + i)->wTime_base2 = sd.wTime_base2;
(pSettingData + i)->CtrlVal0 = sd.CtrlVal0;
(pSettingData + i)->CtrlVal1 = sd.CtrlVal1;
}
pfSetLedData((PBYTE)pSettingData, dLen);

对此有什么看法吗?..谢谢！