Environment : WinCE
i'd like to copy the windows HDC to EGL.
Code :
GLint config_list[] = {
        EGL_RED_SIZE,       5,
        EGL_GREEN_SIZE,     6,
        EGL_BLUE_SIZE,      5,
        EGL_NONE
    };
 
    EGLint num_config;
 
 
    g_dpy = GetDC(gHWND);
 
    display = eglGetDisplay(g_dpy);
 
    if (eglInitialize(display, NULL, NULL) == EGL_FALSE || eglGetError() != EGL_SUCCESS)
    {
        printf("eglInitialize Error!\r\n");
        return;
    }
 
    eglChooseConfig(display, config_list, &config, 1, &num_config);
 
    eglBindAPI(EGL_OPENGL_ES_API);
 
    surface = eglCreateWindowSurface( display, config, (NativeWindowType)(gHWND) , NULL);
    if ( surface == EGL_NO_SURFACE || eglGetError() != EGL_SUCCESS )
    {
        printf("eglCreateWindowSurface Error!\r\n");
        return ;
    }
 
    context = eglCreateContext( display, config, NULL,  NULL );
    if ( context == EGL_NO_CONTEXT || eglGetError() != EGL_SUCCESS )
    {
        printf("eglCreateContext Error!\r\n");
        return ;
    }
 
    if ( eglMakeCurrent( display, surface, surface, context ) == EGL_FALSE || eglGetError() != EGL_SUCCESS )
    {
        printf("eglMakeCurrent Error!\r\n");
        return;
    }

then

HDC memdc = CreateCompatibleDC( (HDC)display );
HBITMAP bitmap = CreateCompatibleBitmap((HDC)display, width, height);
SelectObject( memdc, bitmap );
...draw something
BitBlt( (HDC)display, 0, 0, width, height, memdc, 0, 0, SRCCOPY );

it dosen't work. memdc and hbitmap always 0x000000.
help me. thansk