DirectX9頂点を動かせない

Direct9でポリゴンの頂点を動かすために、
メインループで頂点0のx軸を+1して自動的に動かすようにしたのですが、
クライアント領域でマウスが動いた際にだけしか動きません。
プロジェクトをつくり、DirectX9の初期化とポリゴン描画、そして頂点0のx軸を動かすプログラムを書いたのですが同じ症状です。
whileで何度もx軸の値が変わっているはずなのですが、原因がまったくわかりません。
どなたか教えてください。

DirectX
1#include<windows.h>
2#include<d3d9.h>
3#pragma comment( lib, "d3d9.lib" )
4#pragma comment( lib, "d3dx9d.lib" )
5#pragma comment( lib, "d3dx9.lib" )
6#pragma comment( lib, "dxerr.lib" )
7#define D3DFVF_TLVERTEX     (D3DFVF_XYZRHW|D3DFVF_DIFFUSE|D3DFVF_TEX1)
8
9float f = 0.0f;
10
11typedef struct _D3DTLVERTEX {
12    float   x,y,z;                                  
13    float   rhw;                                    
14    DWORD   color;                                 
15    float   tu, tv;                                 
16}
17//DirectGraphics
18D3DTLVERTEX, *LPD3DTLVERTEX;
19D3DTLVERTEX v[4];
20
21LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp) {
22    switch (msg) {
23    case WM_DESTROY:
24        PostQuitMessage(0);
25        return 0;
26	case WM_ERASEBKGND:
27		return 0;
28    }
29    return DefWindowProc(hwnd, msg, wp, lp);
30}
31
32int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
33    PSTR lpCmdLine, int nCmdShow) {
34    HWND hwnd;
35    MSG msg;
36    WNDCLASS winc;
37    LPDIRECT3D9 m_pD3D = NULL;
38    D3DPRESENT_PARAMETERS m_D3DPP;
39    D3DDISPLAYMODE d3ddm;
40    LPDIRECT3DDEVICE9 m_pD3DDevice = NULL;
41
42    d3ddm.Width = 1280;
43    d3ddm.Height = 720;
44    d3ddm.Format = D3DFMT_A8R8G8B8;
45    d3ddm.RefreshRate = 60;
46    winc.style = CS_HREDRAW | CS_VREDRAW;
47    winc.lpfnWndProc = WndProc;
48    winc.cbClsExtra = winc.cbWndExtra = 0;
49    winc.hInstance = hInstance;
50    winc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
51    winc.hCursor = LoadCursor(NULL, IDC_ARROW);
52    winc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
53    winc.lpszMenuName = NULL;
54    winc.lpszClassName = TEXT("WCN");
55
56    if (!RegisterClass(&winc)) return 0;
57
58    hwnd = CreateWindow(
59        TEXT("WCN"), TEXT("TEST"),
60        WS_OVERLAPPEDWINDOW,
61        175, 50, 1280, 720, NULL, NULL,
62        hInstance, NULL
63    );
64
65    if (hwnd == NULL) return 0;
66    BOOL isFullScreen = FALSE;
67    for (int i = 0; i < __argc; i++) {
68        if (_stricmp(__argv[i], "/f") == 0) {
69            isFullScreen = TRUE;
70            break;
71        }
72    }
73
74
75    if ((m_pD3D = ::Direct3DCreate9(D3D_SDK_VERSION)) == 0) {
76        return E_FAIL;
77    }
78
79    ZeroMemory(&m_D3DPP, sizeof(D3DPRESENT_PARAMETERS));
80
81    m_D3DPP.BackBufferCount = 1;
82    if (isFullScreen) {
83        m_D3DPP.Windowed = FALSE;
84        m_D3DPP.BackBufferWidth = 1280;
85        m_D3DPP.BackBufferHeight = 720;
86    }
87    else {
88        m_D3DPP.Windowed = TRUE;
89    }
90    m_D3DPP.BackBufferFormat = d3ddm.Format;
91    m_D3DPP.SwapEffect = D3DSWAPEFFECT_DISCARD;
92    m_D3DPP.EnableAutoDepthStencil = TRUE;
93    m_D3DPP.AutoDepthStencilFormat = D3DFMT_D16;
94
95    if (FAILED(m_pD3D->CreateDevice(D3DADAPTER_DEFAULT,
96        D3DDEVTYPE_HAL,
97        hwnd,
98        D3DCREATE_HARDWARE_VERTEXPROCESSING,
99        &m_D3DPP, &m_pD3DDevice))) {
100        if (FAILED(m_pD3D->CreateDevice(D3DADAPTER_DEFAULT,
101            D3DDEVTYPE_HAL,
102            hwnd,
103            D3DCREATE_SOFTWARE_VERTEXPROCESSING,
104            &m_D3DPP, &m_pD3DDevice))) {
105            if (FAILED(m_pD3D->CreateDevice(D3DADAPTER_DEFAULT,
106                D3DDEVTYPE_REF,
107                hwnd,
108                D3DCREATE_SOFTWARE_VERTEXPROCESSING,
109                &m_D3DPP, &m_pD3DDevice))) {
110                return E_FAIL;
111            }
112        }
113    }
114
115		v[0].x      = f;
116		v[0].y      = 0.0f;
117		v[0].z      = 0.0f;
118		v[0].rhw    = 1.0f;
119		v[0].color  = D3DCOLOR_RGBA(255,255,1,255);
120		v[0].tu     = 0.0f;
121		v[0].tv     = 0.0f;
122
123		v[1].x      = 1280.0f;
124		v[1].y      = 0.0f;
125		v[1].z      = 0.0f;
126		v[1].rhw    = 1.0f;
127		v[1].color  = D3DCOLOR_RGBA(1,255,255,255);
128		v[1].tu     = 1.0f;
129		v[1].tv     = 0.0f;
130
131		v[2].x      = 0.0f;
132		v[2].y      = 720.0f;
133		v[2].z      = 0.0f;
134		v[2].rhw    = 1.0f;
135		v[2].color  = D3DCOLOR_RGBA(255,1,255,255);
136		v[2].tu     = 0.0f;
137		v[2].tv     = 1.0f;
138
139		v[3].x      = 1280.0f;
140		v[3].y      = 720.0f;
141		v[3].z      = 0.0f;
142		v[3].rhw    = 1.0f;
143		v[3].color  = D3DCOLOR_RGBA(1,255,1,255);
144		v[3].tu     = 1.0f;
145		v[3].tv     = 1.0f;
146
147		m_pD3DDevice->SetFVF( D3DFVF_TLVERTEX );
148
149	ShowWindow(hwnd, nCmdShow);
150
151
152	while (GetMessage(&msg, NULL, 0, 0)){
153		if (FAILED(m_pD3DDevice->Clear(0, NULL,
154			D3DCLEAR_TARGET |
155			D3DCLEAR_ZBUFFER,
156			D3DCOLOR_XRGB(0, 0, 0),
157			1.0f,
158			0))) {
159			return 0;
160		}
161
162		if (FAILED(m_pD3DDevice->BeginScene())) {
163			return 0;
164		}
165
166		m_pD3DDevice->DrawPrimitiveUP( D3DPT_TRIANGLESTRIP, 2, v, sizeof(D3DTLVERTEX));
167
168		f += 1.0f;
169		if(f < 1280.0f){
170			f = 1280.0f;
171		}
172	
173		v[0].x = f;
174
175		m_pD3DDevice->EndScene();
176
177		if (FAILED(m_pD3DDevice->Present(0, 0, 0, 0))) {
178			m_pD3DDevice->Reset(&m_D3DPP);
179		}
180
181		DispatchMessage(&msg);
182	}
183    return msg.wParam;
184}