[python-win32] win32gui and UpdateLayeredWindow

[Alexandru Ionescu]

First I will like to thank Tim Roberts for his answer about GWL_EXSTYL. I 
replaced all the hex values with dec values. Now I don't get any error about 
the 
handles but I get another error:
error:(317,'UpdateLayeredWindow','The system cannot find message text for 
message number 0x%1 in the message fie for %2.')
Please, can you tell me how to properly use the UpdateLayeredWindow?
My latest code version is:

import  wx
import time
import win32gui
import win32api      #for RGB

GWL_EXSTYLE = -20
WS_EX_LAYERED = 524288
WS_EX_TRANSPARENT = 32
LWA_ALPHA = 2
LWA_COLORKEY = 1

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, title = "Test")
        hwnd = self.GetHandle()  
        gwl = win32api.GetWindowLong(hwnd, GWL_EXSTYLE)
        win32gui.SetWindowLong(hwnd, GWL_EXSTYLE, (gwl | WS_EX_LAYERED))
        
        self.bmp = wx.EmptyBitmap(800,600)
         jpg1 = wx.Image('Multiple alpha.png', wx.BITMAP_TYPE_PNG)
        self.bmp = jpg1.ConvertToBitmap()
        w1, h1 = self.bmp.GetWidth(), self.bmp.GetHeight()
        self.SetClientSize( (w1, h1) )
        
        screenDC = win32gui.GetDC(None)
        cScreenDC = win32gui.CreateCompatibleDC(screenDC)
         win32gui.SelectObject(cScreenDC, self.bmp.GetHandle())
        p = (50,50)
        p2 = (0,0)
        s = (816,612)
        blend = (0,0,200,1)
        
        crkey = win32api.RGB(255,255,0)
        flags = (LWA_ALPHA | LWA_COLORKEY)
         
        print win32gui.UpdateLayeredWindow(hwnd,
                                          screenDC,
                                          p,
                                          s,
                                           cScreenDC,
                                          p2,
                                          crkey,
                                          blend,
                                           flags)

app = wx.App()
frame = MyFrame()
frame.Show()
app.SetTopWindow(frame)
app.MainLoop()

Thank you very much,

Alexandru Ionescu


      
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