The screen do not open. | Together C & C++ | Page 1

when i implemented the light function and material funtion. The screen do not open anymore. i find the constentBuffer_matreal becoming zero and i do not understand why ```c++ struct ML { // material
struct ML { // material
float Diffuse[3];
float Ambient[3];
float Specular[3];
float Emissive[3];
float Power;
};

bool material(ID3D11Device* device, ID3D11Buffer*& constentBuffer_matreal) {
ML MATREAL;
MATREAL.Diffuse[0] = 0.0f;
MATREAL.Diffuse[1] = 0.0f;
MATREAL.Diffuse[2] = 0.0f;

MATREAL.Ambient[0] = 0.0f;
MATREAL.Ambient[1] = 0.0f;
MATREAL.Ambient[2] = 0.0f;

MATREAL.Specular[0] = 0.0f;
MATREAL.Specular[1] = 0.0f;
MATREAL.Specular[2] = 0.0f;

MATREAL.Emissive[0] = 0.0f;
MATREAL.Emissive[1] = 0.0f;
MATREAL.Emissive[2] = 0.0f;

MATREAL.Power = 50.0f;

D3D11_BUFFER_DESC BufferDesc_matrix;
BufferDesc_matrix.ByteWidth = sizeof(ML);
BufferDesc_matrix.Usage = D3D11_USAGE_IMMUTABLE;
BufferDesc_matrix.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
BufferDesc_matrix.CPUAccessFlags = 0;
BufferDesc_matrix.MiscFlags = 0;
BufferDesc_matrix.StructureByteStride = 0;

D3D11_SUBRESOURCE_DATA data_1;
data_1.pSysMem = &MATREAL;
data_1.SysMemPitch = 0;
data_1.SysMemSlicePitch = 0;

HRESULT hr = device->CreateBuffer(&BufferDesc_matrix, &data_1, &constentBuffer_matreal);
return !FAILED(hr);

}

#The screen do not open.