Update ep_client.py

syncplay/ep_client.py

@@ -1,9 +1,20 @@
 import sys
+import ctypes
 
 from syncplay.clientManager import SyncplayClientManager
-from syncplay.utils import blackholeStdoutForFrozenWindow
+from syncplay.utils import blackholeStdoutForFrozenWindow, isWindows
 
 def main():   
+    def doWindowsRedistCheck():
+        try:
+            ctypes.CDLL('vcruntime140.dll')
+        except OSError:
+            ctypes.windll.user32.MessageBoxW(0, '''Syncplay relies on the Microsoft Visual C++ Redistributable which is not installed.
+                 It can be downloaded at https://aka.ms/vs/17/release/vc_redist.x86.exe
+                 For more details see http://syncplay.pl/''', "Syncplay", 1)
+        sys.exit()
+    if isWindows():
+        doWindowsRedistCheck()
     blackholeStdoutForFrozenWindow()
     SyncplayClientManager().run()