After i make about several calls,when i am going to make one more call,A unknown exception occured,look at the attachment.then i tried to use vc++.net to debug it,the result(translated from chinese to english) as below:
0x77e8be7d in Skype.exe occured exception : 0xC0000005: conflict occured when access 0x00000002
0x77e8be7d in Skype.exe occured exception : 0xC0000005: conflict occured when access 0x00000002
0x77e8be7d in Skype.exe occured exception : 0xC0000005: conflict occured when access 0x00000002
0x77e8be7d in Skype.exe occured exception : 0xC0000005: conflict occured when access 0x00000002
0x77e8be7d in Skype.exe occured exception : 0xC0000005: conflict occured when access 0x00000002
.......
0x00407984 in Skype.exe occured exception : 0xC00000FD: Stack overflow 。