ChooseColor() не меняется цвет

#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <tchar.h>
#include <windowsx.h>
#include <commdlg.h>
#include <string> 
 
using namespace std;
 
 
#define ID_MYBUTTON 1
 
static TCHAR szWindowClass[] = _T("win32app");
 
static TCHAR szTitle[] = _T("Win32 Guided Tour Application");
 
HINSTANCE hInst;
 
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
 
int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
    WNDCLASSEX wcex;
 
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
    wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = NULL;
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
    
    if (!RegisterClassEx(&wcex))
    {
        MessageBox(NULL,
            _T("Call to RegisterClassEx failed!"),
            _T("Win32 Guided Tour"),
            NULL);
 
        return 1;
    }
 
    hInst = hInstance; 
 
    HWND hWnd = CreateWindow(
        szWindowClass,
        szTitle,
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT,
        500, 500,
        NULL,
        NULL,
        hInst,
        NULL
    );
 
    if (!hWnd)
    {
        MessageBox(NULL,
            _T("Call to CreateWindow failed!"),
            _T("Win32 Guided Tour"),
            NULL);
 
        return 1;
    }
 
    ShowWindow(hWnd,
        nCmdShow);
    UpdateWindow(hWnd);
 
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
 
    return (int) msg.wParam;
    
                         
}
 
HPEN hPen = NULL;
BOOL fDraw= FALSE;
POINT ptPrevious = {0};
    
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{HDC hdc;
    BOOL bRet = FALSE;
    BOOL bCmd = FALSE;
    int wmId    = LOWORD(wParam); 
    int wmEvent = HIWORD(wParam); 
CHOOSECOLOR cc;
    static DWORD rgbCurrent;
    static COLORREF acrCustClr[16];
 
    rgbCurrent= RGB(0, 0, 0);
                ZeroMemory(&cc, sizeof(cc));
                cc.lStructSize = sizeof(cc);
                cc.hwndOwner = hWnd;
                cc.lpCustColors = (LPDWORD) acrCustClr;
                cc.rgbResult = rgbCurrent;
                cc.Flags = CC_FULLOPEN | CC_RGBINIT;
                cc.Flags=CC_RGBINIT ;
                cc.rgbResult=RGB(255, 0, 255);
    switch (message)
    {
        case WM_CREATE:
   CreateWindow(L"button",L"choose color",WS_CHILD|BS_PUSHBUTTON|WS_VISIBLE, 5,5,100,20,hWnd,(HMENU)ID_MYBUTTON,NULL,NULL);
   return 0;
    case WM_COMMAND:
        bCmd = TRUE;
        bRet = TRUE;
        if (ChooseColor(&cc) == TRUE)
                {
                    
                    hPen = CreatePen(PS_SOLID ,1,cc.rgbResult);
                    rgbCurrent = cc.rgbResult;
                }
        break;
    
    case WM_LBUTTONDOWN: 
        fDraw = TRUE; 
        ptPrevious.x = LOWORD(lParam); 
        ptPrevious.y = HIWORD(lParam); 
        break;
    case WM_LBUTTONUP: 
        if(fDraw) 
        { 
            hdc = GetDC(hWnd); 
            MoveToEx(hdc, ptPrevious.x, ptPrevious.y, NULL); 
            LineTo(hdc, LOWORD(lParam), HIWORD(lParam)); 
            ReleaseDC(hWnd, hdc);
            fDraw = FALSE; 
        } 
        break;
    case WM_MOUSEMOVE: 
        if (fDraw) 
        { 
            hdc = GetDC(hWnd); 
            MoveToEx(hdc, ptPrevious.x, ptPrevious.y, NULL); 
            LineTo  
            (
                hdc, 
                ptPrevious.x = LOWORD(lParam), 
                ptPrevious.y = HIWORD(lParam)
            ); 
            ReleaseDC(hWnd, hdc); 
        } 
        break;
    case WM_QUIT:
    case WM_CLOSE:
    case WM_DESTROY:
        PostQuitMessage(0);
        EndDialog(hWnd, LOWORD(wParam));
        break;
    
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
        break;
    }
 
    return 0;
}

rgbCurrent= RGB(0, 0, 0);
ZeroMemory(&cc, sizeof(cc));
cc.lStructSize = sizeof(cc);
cc.hwndOwner = hWnd;
cc.lpCustColors = (LPDWORD) acrCustClr;
cc.rgbResult = rgbCurrent;
cc.Flags = CC_FULLOPEN | CC_RGBINIT;
cc.Flags=CC_RGBINIT ;
cc.rgbResult=RGB(255, 0, 255);  //и определитесь какой цвет вы передаёте ChooseColor диалогу

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC hdc;
    HGDIOBJ old;
    BOOL bRet = FALSE;
    BOOL bCmd = FALSE;
    int wmId = LOWORD(wParam);
    int wmEvent = HIWORD(wParam);
    static CHOOSECOLOR cc;
    static DWORD rgbCurrent = NULL;
    static COLORREF acrCustClr[16];
    switch (message) {
    case WM_CREATE:
        CreateWindow("button", "choose color", WS_CHILD | BS_PUSHBUTTON | WS_VISIBLE, 5, 5, 100, 20, hWnd, (HMENU)ID_MYBUTTON, NULL, NULL);
        ZeroMemory(&cc, sizeof(cc));
        cc.lStructSize = sizeof(cc);
        cc.hwndOwner = hWnd;
        cc.lpCustColors = (LPDWORD)acrCustClr;
        cc.rgbResult = rgbCurrent;
        cc.Flags = CC_FULLOPEN | CC_RGBINIT;
        break;
    case WM_COMMAND:
        bCmd = TRUE;
        bRet = TRUE;
        cc.rgbResult = rgbCurrent;
        if (ChooseColor(&cc) == TRUE) {
            hPen = CreatePen(PS_SOLID, 1, cc.rgbResult);
            rgbCurrent = cc.rgbResult;
        }
        break;
    case WM_LBUTTONDOWN:
        fDraw = TRUE;
        ptPrevious.x = LOWORD(lParam);
        ptPrevious.y = HIWORD(lParam);
        break;
    case WM_LBUTTONUP:
        if (fDraw) {
            hdc = GetDC(hWnd);
            old = SelectObject(hdc, hPen);
            MoveToEx(hdc, ptPrevious.x, ptPrevious.y, NULL);
            LineTo(hdc, LOWORD(lParam), HIWORD(lParam));
            SelectObject(hdc, old);
            ReleaseDC(hWnd, hdc);
            fDraw = FALSE;
        }
        break;
    case WM_MOUSEMOVE:
        if (fDraw) {
            hdc = GetDC(hWnd);
            old = SelectObject(hdc, hPen);
            MoveToEx(hdc, ptPrevious.x, ptPrevious.y, NULL);
            LineTo(hdc, ptPrevious.x = LOWORD(lParam), ptPrevious.y = HIWORD(lParam));
            SelectObject(hdc, old);
            ReleaseDC(hWnd, hdc);
        }
        break;
    case WM_DESTROY:
        if (hPen)
            DeleteObject(hPen);
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}