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int pathGetContainer(const char *path, string &dir)
{
	const char *p;
	for (p = path + strlen(path); p >= path; p--)
	{
		if (*p == '/' || *p == '\\')
			break;
	}
	dir = string(path).substr(0, p - path + 1);
	return 1;
}
 
...
	char curPath[1024];
	GetModuleFileNameA(AfxGetApp()->m_hInstance, curPath, sizeof(curPath));
	string curDir;
	pathGetContainer(curPath, curDir);
	SetCurrentDirectoryA(curDir.c_str());
...