Setting Constant Buffer Directx - c++

Question

So, I'm trying to get my constant buffer in my shader to have a projection matrix that is orthogonal...
Can anyone tell me why I'm rendering nothing now that I tried to do this?
I assumed I needed to make two mapped subresources, and two buffers, one for vertex and the other for constant, maybe this is wrong?
Here is my code:
Vertex OurVertices[] =
{
{ D3DXVECTOR2(-0.5f,-0.5f), D3DXCOLOR(0.0f, 0.0f, 0.0f, 1.0f) },
{ D3DXVECTOR2(-0.5f,0.5f), D3DXCOLOR(0.0f, 1.0f, 0.0f, 1.0f) },
{ D3DXVECTOR2(0.5f,0.5f), D3DXCOLOR(0.0f, 0.0f, 1.0f, 1.0f) },
{ D3DXVECTOR2(-0.5f,-0.5f), D3DXCOLOR(1.0f, 0.0f, 0.0f, 1.0f) },
{ D3DXVECTOR2(0.5f,0.5f), D3DXCOLOR(0.0f, 1.0f, 0.0f, 1.0f) },
{ D3DXVECTOR2(0.5f,-0.5f), D3DXCOLOR(0.0f, 0.0f, 1.0f, 1.0f) }
};
// create the vertex buffer
D3D11_BUFFER_DESC vertexBufferDesc;
ZeroMemory(&vertexBufferDesc, sizeof(vertexBufferDesc));
vertexBufferDesc.Usage = D3D11_USAGE_DYNAMIC; // write access access by CPU and GPU
vertexBufferDesc.ByteWidth = sizeof(Vertex) * 6; // size is the VERTEX struct * 3
vertexBufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER; // use as a vertex buffer
vertexBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; // allow CPU to write in buffer
dev->CreateBuffer(&vertexBufferDesc, NULL, &pVBuffer); // create the buffer
D3D11_MAPPED_SUBRESOURCE ms_Vertex;
devcon->Map(pVBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &ms_Vertex);
memcpy(ms_Vertex.pData, OurVertices, sizeof(OurVertices)); // copy the data
devcon->Unmap(pVBuffer, NULL); // unmap the buffer
devcon->VSSetConstantBuffers(NULL, 1, &pVBuffer); // Finanly set the constant buffer in the vertex shader with the updated values.
MatrixBufferType* dataPtr;
D3D11_BUFFER_DESC constantBufferDesc; // create the constant buffer
ZeroMemory(&constantBufferDesc, sizeof(constantBufferDesc));
constantBufferDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
constantBufferDesc.Usage = D3D11_USAGE_DYNAMIC;
constantBufferDesc.ByteWidth = sizeof(MatrixBufferType);
constantBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
constantBufferDesc.MiscFlags = 0;
constantBufferDesc.StructureByteStride = 0;
dev->CreateBuffer(&constantBufferDesc, NULL, &pCBuffer); // create the buffer
D3D11_MAPPED_SUBRESOURCE ms_CBuffer;
devcon->Map(pCBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &ms_CBuffer);
D3DXMatrixOrthoLH(&m_orthoMatrix, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 1);
D3DXMatrixTranspose(&m_orthoMatrix, &m_orthoMatrix);
dataPtr = (MatrixBufferType*)ms_CBuffer.pData;
dataPtr->projection = m_orthoMatrix;
memcpy(ms_CBuffer.pData, &dataPtr, sizeof(MatrixBufferType));
devcon->Unmap(pCBuffer, NULL);
devcon->VSSetConstantBuffers(NULL, 1, &pCBuffer); // Finally set the constant buffer in the vertex shader with the updated values.
So, attempting to put my projection matrix to use in my shader code:
cbuffer ConstantBuffer
{
matrix world;
matrix view;
matrix projection;
};
VOut VShader(float4 position : POSITION, float4 color : COLOR)
{
VOut output;
output.position = position;
output.position = mul(output.position, projection);
output.color = color;
return output;
}
Causes my quad which was originally rendering, to disappear.
This leads me to believe I'm doing something wrong, I just don't know what yet.