Drawing text on a custom button in windows api - c

Question

i'm trying to make a custom windows 8 style button using windows C API. however when i try to draw the text on the button after i redraw the button nothing visible happens!
I even tried creating a static window as a child of the button and sending WS_ERASEBKGND message to it when i redraw the button but as soon as i redraw the button for the first time it disappears!
here is the window procedure for my custom button:
LRESULT CALLBACK ButtonWindowProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
//static HWND static_text_handle;
HDC hdc;
PAINTSTRUCT ps;
DWORD color;
HFONT font,holdFont;
static RECT rect;
wchar_t test[] = L"test";
TRACKMOUSEEVENT tme = {sizeof(TRACKMOUSEEVENT),TME_LEAVE,hwnd,HOVER_DEFAULT};
/*static*/ HBRUSH brush = CreateSolidBrush(RGB(20,30,40));
/*static*/ HBRUSH clicked_brush = CreateSolidBrush(RGB(40,50,60));
/*static*/ HBRUSH hover_brush = CreateSolidBrush(RGB(70,80,90));
//TrackMouseEvent(&tme);
switch(msg)
{
case WM_CREATE:
//static_text_handle = CreateWindowW(L"Static",L"test",WS_CHILD | WS_VISIBLE,0,0,20,20,hwnd,NULL,NULL,NULL);
//brush = ((struct custom_button_colors*)(lParam))->default_color;
//clicked_brush = ((struct custom_button_colors*)(lParam))->push_color;
//hover_brush = ((struct custom_button_colors*)(lParam))->hover_color;
break;
case WM_LBUTTONDOWN:
SendMessage(hwnd,WM_ERASEBKGND,(WPARAM)GetDC(hwnd),(LPARAM)LPARAM_L_DOWN);
break;
case WM_LBUTTONUP:
SendMessage(hwnd,WM_ERASEBKGND,(WPARAM)GetDC(hwnd),(LPARAM)LPARAM_L_UP);
break;
case WM_MOUSEMOVE:
//Beep(1000,1000);
TrackMouseEvent(&tme);
if (GetAsyncKeyState(VK_LBUTTON))
{
SendMessage(hwnd,WM_ERASEBKGND,(WPARAM)GetDC(hwnd),(LPARAM)LPARAM_L_DOWN);
}
else
{
SendMessage(hwnd,WM_ERASEBKGND,(WPARAM)GetDC(hwnd),(LPARAM)LPARAM_MOUSEHOVER);
}
break;
case WM_MOUSELEAVE:
SendMessage(hwnd,WM_ERASEBKGND,(WPARAM)GetDC(hwnd),(LPARAM)-1);
break;
case WM_ERASEBKGND:
GetClientRect(hwnd,&rect);
if (lParam == LPARAM_L_DOWN)
{
FillRect((HDC)wParam,&rect,clicked_brush);
}
else if (lParam == LPARAM_MOUSEHOVER)
{
FillRect((HDC)wParam,&rect,hover_brush);
break;
}
else
{
POINT mousepos;
GetCursorPos(&mousepos);
if (WindowFromPoint(mousepos) == hwnd)
{
FillRect((HDC)wParam,&rect,hover_brush);
}
else
{
FillRect((HDC)wParam,&rect,brush);
}
}
hdc = BeginPaint(hwnd,&ps);
color = GetSysColor(COLOR_BTNFACE);
SetBkColor(hdc,color);
font = CreateFontW(25, 0, 0, 0, FW_MEDIUM, 0, 0, 0, 0,0, 0, ANTIALIASED_QUALITY, 0, L"Tahoma");
holdFont = SelectObject(hdc, font);
TextOutW(hdc,200,200,test,lstrlenW(test));
SelectObject(hdc,holdFont);
DeleteObject(font);
EndPaint(hwnd,&ps);
break;
default:
return DefWindowProc(hwnd,msg,wParam,lParam);
}
return 0;
}
I'm an absolute beginner in windows programming so sorry if my question is trivial.

Answer 1

1) Do not use BeginPaint/EndPaint in WM_ERASEBKGND. Move that code in a WM_PAINT handler.
2) Use SetWindowLong and the GWL_USERDATA index for storing the button state (UP or DOWN) and use GetWindowLong for retrieving the current state.
3) Use SetCapture for capturing the mouse, starting with WM_LBUTTONDOWN. Update the state of the button (UP or DOWN) according to mouse position
4) Use RedrawWindow when you need painting to occur