#define FORWARD_WM_SYSDEADCHAR(hwnd, ch, cRepeat, fn) \
    (void)(fn)((hwnd), WM_SYSDEADCHAR, (WPARAM)(UINT)(ch), MAKELPARAM((UINT)(cRepeat), 0))

/* void Cls_OnMouseMove(HWND hwnd, int x, int y, UINT keyFlags); */
#define HANDLE_WM_MOUSEMOVE(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_MOUSEMOVE(hwnd, x, y, keyFlags, fn) \
    (void)(fn)((hwnd), WM_MOUSEMOVE, (WPARAM)(UINT)(keyFlags), MAKELPARAM((x), (y)))

/* void Cls_OnLButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags); */
#define HANDLE_WM_LBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_LBUTTONDOWN(hwnd, fDoubleClick, x, y, keyFlags, fn) \
    (void)(fn)((hwnd), (fDoubleClick) ? WM_LBUTTONDBLCLK : WM_LBUTTONDOWN, (WPARAM)(UINT)(keyFlags), MAKELPARAM((x), (y)))

/* void Cls_OnLButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags); */
#define HANDLE_WM_LBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)

/* void Cls_OnLButtonUp(HWND hwnd, int x, int y, UINT keyFlags); */
#define HANDLE_WM_LBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_LBUTTONUP(hwnd, x, y, keyFlags, fn) \
    (void)(fn)((hwnd), WM_LBUTTONUP, (WPARAM)(UINT)(keyFlags), MAKELPARAM((x), (y)))

/* void Cls_OnRButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags); */
#define HANDLE_WM_RBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_RBUTTONDOWN(hwnd, fDoubleClick, x, y, keyFlags, fn) \
    (void)(fn)((hwnd), (fDoubleClick) ? WM_RBUTTONDBLCLK : WM_RBUTTONDOWN, (WPARAM)(UINT)(keyFlags), MAKELPARAM((x), (y)))

/* void Cls_OnRButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags); */
#define HANDLE_WM_RBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)

/* void Cls_OnRButtonUp(HWND hwnd, int x, int y, UINT flags); */
#define HANDLE_WM_RBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_RBUTTONUP(hwnd, x, y, keyFlags, fn) \
    (void)(fn)((hwnd), WM_RBUTTONUP, (WPARAM)(UINT)(keyFlags), MAKELPARAM((x), (y)))

/* void Cls_OnMButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags); */
#define HANDLE_WM_MBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_MBUTTONDOWN(hwnd, fDoubleClick, x, y, keyFlags, fn) \
    (void)(fn)((hwnd), (fDoubleClick) ? WM_MBUTTONDBLCLK : WM_MBUTTONDOWN, (WPARAM)(UINT)(keyFlags), MAKELPARAM((x), (y)))

/* void Cls_OnMButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags); */
#define HANDLE_WM_MBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)

/* void Cls_OnMButtonUp(HWND hwnd, int x, int y, UINT flags); */
#define HANDLE_WM_MBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_MBUTTONUP(hwnd, x, y, keyFlags, fn) \
    (void)(fn)((hwnd), WM_MBUTTONUP, (WPARAM)(UINT)(keyFlags), MAKELPARAM((x), (y)))

/* void Cls_OnNCMouseMove(HWND hwnd, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCMOUSEMOVE(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_NCMOUSEMOVE(hwnd, x, y, codeHitTest, fn) \
    (void)(fn)((hwnd), WM_NCMOUSEMOVE, (WPARAM)(UINT)(codeHitTest), MAKELPARAM((x), (y)))

/* void Cls_OnNCLButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCLBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_NCLBUTTONDOWN(hwnd, fDoubleClick, x, y, codeHitTest, fn) \
    (void)(fn)((hwnd), (fDoubleClick) ? WM_NCLBUTTONDBLCLK : WM_NCLBUTTONDOWN, (WPARAM)(UINT)(codeHitTest), MAKELPARAM((x), (y)))

/* void Cls_OnNCLButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCLBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)

/* void Cls_OnNCLButtonUp(HWND hwnd, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCLBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_NCLBUTTONUP(hwnd, x, y, codeHitTest, fn) \
    (void)(fn)((hwnd), WM_NCLBUTTONUP, (WPARAM)(UINT)(codeHitTest), MAKELPARAM((x), (y)) )

/* void Cls_OnNCRButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCRBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_NCRBUTTONDOWN(hwnd, fDoubleClick, x, y, codeHitTest, fn) \
    (void)(fn)((hwnd), (fDoubleClick) ? WM_NCRBUTTONDBLCLK : WM_NCRBUTTONDOWN, (WPARAM)(UINT)(codeHitTest), MAKELPARAM((x), (y)) )

/* void Cls_OnNCRButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCRBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)

/* void Cls_OnNCRButtonUp(HWND hwnd, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCRBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_NCRBUTTONUP(hwnd, x, y, codeHitTest, fn) \
    (void)(fn)((hwnd), WM_NCRBUTTONUP, (WPARAM)(UINT)(codeHitTest), MAKELPARAM((x), (y)) )

/* void Cls_OnNCMButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCMBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_NCMBUTTONDOWN(hwnd, fDoubleClick, x, y, codeHitTest, fn) \
    (void)(fn)((hwnd), (fDoubleClick) ? WM_NCMBUTTONDBLCLK : WM_NCMBUTTONDOWN, (WPARAM)(UINT)(codeHitTest), MAKELPARAM((x), (y)) )

/* void Cls_OnNCMButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCMBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)

/* void Cls_OnNCMButtonUp(HWND hwnd, int x, int y, UINT codeHitTest); */
#define HANDLE_WM_NCMBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)LOWORD(lParam), (int)HIWORD(lParam), (UINT)(wParam)), 0L)
#define FORWARD_WM_NCMBUTTONUP(hwnd, x, y, codeHitTest, fn) \
    (void)(fn)((hwnd), WM_NCMBUTTONUP, (WPARAM)(UINT)(codeHitTest), MAKELPARAM((x), (y)) )

/* int Cls_OnMouseActivate(HWND hwnd, HWND hwndTopLevel, UINT codeHitTest, UINT msg); */
#define HANDLE_WM_MOUSEACTIVATE(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(int)(fn)((hwnd), (HWND)(wParam), (UINT)LOWORD(lParam), (UINT)HIWORD(lParam))
#define FORWARD_WM_MOUSEACTIVATE(hwnd, hwndTopLevel, codeHitTest, msg, fn) \
    (int)(DWORD)(fn)((hwnd), WM_MOUSEACTIVATE, (WPARAM)(HWND)(hwndTopLevel), MAKELPARAM((codeHitTest), (msg)))

/* void Cls_OnCancelMode(HWND hwnd); */
#define HANDLE_WM_CANCELMODE(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_CANCELMODE(hwnd, fn) \
    (void)(fn)((hwnd), WM_CANCELMODE, 0, 0L)

/* void Cls_OnTimer(HWND hwnd, UINT id); */
#define HANDLE_WM_TIMER(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (UINT)(wParam)), 0L)
#define FORWARD_WM_TIMER(hwnd, id, fn) \
    (void)(fn)((hwnd), WM_TIMER, (WPARAM)(UINT)(id), 0L)

/* void Cls_OnInitMenu(HWND hwnd, HMENU hMenu); */
#define HANDLE_WM_INITMENU(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HMENU)(wParam)), 0L)
#define FORWARD_WM_INITMENU(hwnd, hMenu, fn) \
    (void)(fn)((hwnd), WM_INITMENU, (WPARAM)(HMENU)(hMenu), 0L)

/* void Cls_OnInitMenuPopup(HWND hwnd, HMENU hMenu, int item, BOOL fSystemMenu); */
#define HANDLE_WM_INITMENUPOPUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HMENU)(wParam), (int)LOWORD(lParam), (BOOL)HIWORD(lParam)), 0L)
#define FORWARD_WM_INITMENUPOPUP(hwnd, hMenu, item, fSystemMenu, fn) \
    (void)(fn)((hwnd), WM_INITMENUPOPUP, (WPARAM)(HMENU)(hMenu), MAKELPARAM((item),(fSystemMenu)))

/* void Cls_OnMenuSelect(HWND hwnd, HMENU hmenu, int item, HMENU hmenuPopup, UINT flags); */
#define HANDLE_WM_MENUSELECT(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HMENU)HIWORD(lParam), (LOWORD(lParam) & MF_POPUP) ? 0 : (int)(wParam), \
                            (LOWORD(lParam) & MF_POPUP) ? (HMENU)(wParam) : 0, LOWORD(lParam)), 0L)
#define FORWARD_WM_MENUSELECT(hwnd, hmenu, item, hmenuPopup, flags, fn) \
    (void)(fn)((hwnd), WM_MENUSELECT, ((flags) & MF_POPUP) ? (WPARAM)(HMENU)(hmenuPopup) : (WPARAM)(int)(item), MAKELPARAM((flags), (hmenu)))

/* DWORD Cls_OnMenuChar(HWND hwnd, UINT ch, UINT flags, HMENU hmenu); */
#define HANDLE_WM_MENUCHAR(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(fn)((hwnd), (UINT)(wParam), LOWORD(lParam), (HMENU)HIWORD(lParam));
#define FORWARD_WM_MENUCHAR(hwnd, ch, flags, hmenu, fn) \
    (DWORD)(fn)((hwnd), WM_MENUCHAR, (WPARAM)(UINT)(ch), MAKELPARAM((flags), (UINT)(hmenu)))

/* void Cls_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify); */
#define HANDLE_WM_COMMAND(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)(wParam), (HWND)LOWORD(lParam), (UINT)HIWORD(lParam)), 0L)
#define FORWARD_WM_COMMAND(hwnd, id, hwndCtl, codeNotify, fn) \
    (void)(fn)((hwnd), WM_COMMAND, (WPARAM)(int)(id), MAKELPARAM((UINT)(hwndCtl), (codeNotify)))

/* void Cls_OnHScroll(HWND hwnd, HWND hwndCtl, UINT code, int pos); */
#define HANDLE_WM_HSCROLL(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)HIWORD(lParam), (UINT)(wParam), (int)LOWORD(lParam)), 0L)
#define FORWARD_WM_HSCROLL(hwnd, hwndCtl, code, pos, fn) \
    (void)(fn)((hwnd), WM_HSCROLL, (WPARAM)(UINT)(code), MAKELPARAM((pos), (UINT)(hwndCtl)))

/* void Cls_OnVScroll(HWND hwnd, HWND hwndCtl, UINT code, int pos); */
#define HANDLE_WM_VSCROLL(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)HIWORD(lParam), (UINT)(wParam),  (int)LOWORD(lParam)), 0L)
#define FORWARD_WM_VSCROLL(hwnd, hwndCtl, code, pos, fn) \
    (void)(fn)((hwnd), WM_VSCROLL, (WPARAM)(UINT)(code), MAKELPARAM((pos), (UINT)(hwndCtl)))

/* void Cls_OnCut(HWND hwnd); */
#define HANDLE_WM_CUT(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_CUT(hwnd, fn) \
    (void)(fn)((hwnd), WM_CUT, 0, 0L)

/* void Cls_OnCopy(HWND hwnd); */
#define HANDLE_WM_COPY(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_COPY(hwnd, fn) \
    (void)(fn)((hwnd), WM_COPY, 0, 0L)

/* void Cls_OnPaste(HWND hwnd); */
#define HANDLE_WM_PASTE(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_PASTE(hwnd, fn) \
    (void)(fn)((hwnd), WM_PASTE, 0, 0L)

/* void Cls_OnClear(HWND hwnd); */
#define HANDLE_WM_CLEAR(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_CLEAR(hwnd, fn) \
    (void)(fn)((hwnd), WM_CLEAR, 0, 0L)

/* void Cls_OnUndo(HWND hwnd); */
#define HANDLE_WM_UNDO(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_UNDO(hwnd, fn) \
    (void)(fn)((hwnd), WM_UNDO, 0, 0L)

/* HANDLE Cls_OnRenderFormat(HWND hwnd, UINT fmt); */
#define HANDLE_WM_RENDERFORMAT(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(HANDLE)(fn)((hwnd), (UINT)(wParam))
#define FORWARD_WM_RENDERFORMAT(hwnd, fmt, fn) \
    (HANDLE)(UINT)(DWORD)(fn)((hwnd), WM_RENDERFORMAT, (WPARAM)(UINT)(fmt), 0L)

/* void Cls_OnRenderAllFormats(HWND hwnd); */
#define HANDLE_WM_RENDERALLFORMATS(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_RENDERALLFORMATS(hwnd, fn) \
    (void)(fn)((hwnd), WM_RENDERALLFORMATS, 0, 0L)

/* void Cls_OnDestroyClipboard(HWND hwnd); */
#define HANDLE_WM_DESTROYCLIPBOARD(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_DESTROYCLIPBOARD(hwnd, fn) \
    (void)(fn)((hwnd), WM_DESTROYCLIPBOARD, 0, 0L)

/* void Cls_OnDrawClipboard(HWND hwnd); */
#define HANDLE_WM_DRAWCLIPBOARD(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)