32 bit WPF .NET app can't find its 32 bit dll - c++

Question

I use P/Invoke, not C++/CLI and am working on Visual Studio 2017.
My app is WPF.NET – 32 bit, written in C#. The app loads successfully its 32-bit DLL when I run it on my PCx64, but it crashes when I run it on a virtual machine (64 or 32). I think couldn't add the DLL...and don't know why.
My DLL is written on C++ and includes a class, with some functions written on Assembler. May be the problem comes from it?
MyClass.cpp:
int MyClass::Foo_1()
{
__asm
{
mov eax, 0
}
}
void MyClass::SetFoo_1()
{
resultEAX = new int;
int a = -1;
try
{
a = Foo_1();
}
catch (int e) { }
if (a == 0) {
*resultEAX = 0;
}
else {
*resultEAX = 1;
}
}
MyClass.h:
#ifndef MYCLASS_H
#define MYCLASS_H
class __declspec(dllexport) MyClass {
public:
int * resultEAX ;
int Foo1();
void SetFoo_1();
int GetEAX();
};
#endif
MyClassCaller.h:
extern "C" {
#endif
__declspec(dllexport) MyClass* Create();
__declspec(dllexport) void Dispose(MyClass* a_pObject);
__declspec(dllexport) void SetFoo_1(MyClass* a_pObject);
__eclspec(dllexport) int GetEAX(MyClass* a_pObject);
#ifdef __cplusplus
}
#endif
MyClassCaller.cpp:
Graphics* Create()
{
return new MyClass();
}
void Dispose(MyClass * a_pObject)
{
if (a_pObject != NULL)
{
delete a_pObject;
a_pObject = NULL;
}
}
void SetFoo_1(MyClass * a_pObject)
{
if (a_pObject != nullptr)
{
a_pObject->SetFoo_1();
}
}
int GetEAX(MyClass * a_pObject)
{
if (a_pObject != NULL)
{
return a_pObject->GetEAX();
}
return 0;
}
And I call the class from WPF.NET using managed C# code:
IntPtr pMyClass = MyClassHandling.Create();
Int32 a = 0;
Int64 b = 0;
long c = 0;
long rslt = 0;
try
{
MyClassHandling.SetFoo_1(pMyClass);
if (Environment.Is64BitOperatingSystem)
{
//"SysWOW64"
b = MyClassHandling.GetEAX(pMyClass);
//……
}
else
{
//"system32"
a = pMyClassHandling.GetEAX(pGraphics);
//…
}
MyClassHandling.Dispose (pGraphics);
pMyClass = IntPtr.Zero;
[DllImport("SomeAssemblerFunctions.dll")]
static public extern IntPtr Create();
[DllImport("SomeAssemblerFunctions.dll")]
static public extern void Dispose(IntPtr pGraphicsObject);
[DllImport("SomeAssemblerFunctions.dll", EntryPoint = "SetGraphicMode1")]
static public extern void SetFoo_1(IntPtr pGraphicsObject);
[DllImport("SomeAssemblerFunctions.dll", EntryPoint = "GetEAX")]
static public extern int GetEAX(IntPtr pGraphicsObject);