사각형 회전 가능한가요??

#include
#include "stdafx.h"
HINSTANCE g_hInst;

const wchar_t * lpszClass = TEXT("Graph Out - MHSPECIAL");

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdParam, int nCmdShow)

{

HWND hWnd;

MSG msg;

WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW;

wndclass.cbClsExtra = 0;

wndclass.cbWndExtra = 0;

wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);

wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);

wndclass.hInstance = hInstance;

wndclass.lpfnWndProc = WndProc;

wndclass.lpszClassName = lpszClass;

wndclass.lpszMenuName = NULL;

RegisterClass(&wndclass);

hWnd = CreateWindow(lpszClass, lpszClass, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);

ShowWindow(hWnd, nCmdShow);

while (GetMessage(&msg, NULL, 0, 0))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

return (int)msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)

{

PAINTSTRUCT ps;
HDC hdc;
HPEN myPen, oldPen;
HBRUSH myBrush, oldBrush;

static int x = 50;
static int y = 50;
static int temp_x;
static int temp_y;
static BOOL bMove = FALSE;

static int tx = 70;
static int ty = 90;
static int temp_tx;
static int temp_ty;

switch (msg)

{

case WM_LBUTTONDOWN:
int x1, y1;
int tx1, ty1;

x1 = LOWORD(lParam);
tx1 = LOWORD(lParam);
y1 = HIWORD(lParam);
ty1 = HIWORD(lParam);

if ((xx1) && (yy1))

{

temp_x = x1 - x;
temp_tx = tx1 - tx;
temp_y = y1 - y;
temp_ty = ty1 - ty;

bMove = TRUE;

}

return 0;

case WM_MOUSEMOVE:

if (bMove == TRUE)

{

x = LOWORD(lParam) - temp_x;
tx = LOWORD(lParam) - temp_tx;
y = HIWORD(lParam) - temp_y;
ty = HIWORD(lParam) - temp_ty;
InvalidateRect(hwnd, NULL, TRUE);

return 0;

}

case WM_LBUTTONUP:

bMove = FALSE;

return 0;

case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);

myBrush = CreateSolidBrush(RGB(255, 255, 128));
oldBrush = (HBRUSH)SelectObject(hdc, myBrush);
Rectangle(hdc, x, y, x + 100, y + 100);
SelectObject(hdc, oldBrush);
DeleteObject(myBrush);

TextOut(hdc, tx, ty, TEXT("안녕"), 4);
SetTextAlign(hdc, TA_UPDATECP);
EndPaint(hwnd, &ps);

return 0;

case WM_DESTROY:

PostQuitMessage(0);

return 0;

}

return DefWindowProc(hwnd, msg, wParam, lParam);

}

정말 간단하게 사각형을 띄워놓고 마우스로 클릭후 드래그할때 회전시키면서 이동시키려하는데

혹시 방법이있나요;;??

matrix 이용할수도 있을것같은데...변환행렬등등 회전에관한건 구글링 다 해보고있는데

막 배우는 초보자 입장인데 이 부분에서 딱 막혀버렸네요;;