from com import create_instance, gen_method, Structure, POINTER, byref
from com import HWND, ULARGE_INTEGER, INT, UINT, DWORD, HICON, WCHAR
CLSID_TaskbarList = "{56FDF344-FD6D-11d0-958A-006097C9A090}"
IID_ITaskbarList3 = "{EA1AFB91-9E28-4B86-90E9-9E9F8A5EEFAF}"

from ctypes import windll
LoadImage = windll.user32.LoadImageW
IMAGE_ICON = 1
LR_LOADFROMFILE = 0x00000010
LR_DEFAULTSIZE = 0x00000040
LR_SHARED = 0x00008000
ic = HICON(LoadImage(0, u'res\win_taskbar_pause.ico', IMAGE_ICON, 0, 0, LR_LOADFROMFILE|LR_DEFAULTSIZE|LR_SHARED))
print ic

class THUMBBUTTON(Structure):
    _fields_ = [("dwMask", INT),
                ("iId", UINT),
                ("iBitmap", UINT),
                ("hIcon", HICON),
                ("szTip", WCHAR*260),
                ("dwFlags", INT)]

class ITaskBarList3:
    methods = ("SetProgressValue", 9, (HWND,ULARGE_INTEGER,ULARGE_INTEGER)), \
            ("SetProgressState", 10, (HWND,INT)), \
            ("RegisterTab", 11, (HWND,HWND)), \
            ("UnregisterTab", 12, (HWND,)), \
            ("SetTabOrder", 13, (HWND,HWND)), \
            ("SetTabActive", 14, (HWND,HWND,DWORD)), \
            ("ThumbBarAddButtons", 15, (HWND,UINT, POINTER(THUMBBUTTON)))

    def __init__(self):
        self.ptr = create_instance(CLSID_TaskbarList, IID_ITaskbarList3)
        if self.ptr:
            for i in self.methods:
                setattr(self, i[0], gen_method(self.ptr, i[1], *i[2]))
            self.Release = gen_method(self.ptr, 2)
        else: print "CoCreateInstance failed"

    def __del__(self):
        if self.ptr:
            self.Release()

import PyQt4.QtGui, sys
app = PyQt4.QtGui.QApplication(sys.argv)
mainwnd = PyQt4.QtGui.QMainWindow()
mainwnd.show()

taskbar = ITaskBarList3()
taskbar.SetProgressValue(int(mainwnd.winId()), 5, 10)
taskbar.SetProgressState(int(mainwnd.winId()), 4)
buttons = (THUMBBUTTON * 1)()
buttons[0].dwMask = INT()
buttons[0].iId = UINT()
buttons[0].iBitmap = UINT()
buttons[0].hIcon = ic
buttons[0].szTip = u"hello\0"
buttons[0].dwFlags = INT()
print len(buttons[0].szTip)
print taskbar.ThumbBarAddButtons(int(mainwnd.winId()),1,buttons[0])
del taskbar

ret = app.exec_()
del app




#######################com.py#####################################################################

import ctypes
from ctypes import c_int,c_uint,c_short,c_ubyte,byref,Structure,oledll,c_long, POINTER
from ctypes.wintypes import HRESULT, HWND, ULARGE_INTEGER, INT, DWORD, UINT, HICON, WCHAR
#from _ctypes import call_commethod
ole32 = oledll.ole32

class Guid(Structure):
    _fields_ = [("Data1", c_uint),
                ("Data2", c_short),
                ("Data3", c_short),
                ("Data4", c_ubyte*8)]

    def __init__(self, name):
        ole32.CLSIDFromString(unicode(name), byref(self))

def gen_method(ptr, method_index, *arg_types):
    c_long_p = POINTER(ctypes.c_int)
    vtable = ctypes.cast(ptr, c_long_p).contents.value
    def func(*args):
        return ctypes.WINFUNCTYPE(HRESULT, c_long, *arg_types)(
            ctypes.cast(vtable + method_index*4, c_long_p).contents.value)(
            ptr, *args)
    return func

def create_instance(clsid, iid):
    ptr = c_int()
    try:
        res = ole32.CoCreateInstance(byref(Guid(clsid)), 0, 1, byref(Guid(iid)), byref(ptr))
        if not res:
            return ptr.value
        else: return 0
    except: return 0