I’ve seen this question many times asked in forums. Unfortunatelly, not all the answers are ok. A a good wait to find the available COM ports is by using function GetDefaultCommConfig, that returns the default configuration for a specified communication device. Following code shows how to use it:<\/p>\n
#include <vector>\r\n#include <string> \r\n\r\n\/\/ this can be defined in a separate file\r\n#ifdef _UNICODE\r\n #define tstring std::wstring\r\n#else\r\n #define tstring std::string\r\n#endif \r\n\r\nvoid DetectComPorts(std::vector< tstring >& ports, size_t upperLimit = 128)\r\n{\r\n for(size_t i=1; i<=upperLimit; i++)\r\n {\r\n\tTCHAR strPort[32] = {0};\r\n\t_stprintf(strPort, _T(\"\\\\\\\\.\\\\COM%d\"), i); \r\n\r\n\tDWORD dwSize = 0;\r\n\tLPCOMMCONFIG lpCC = (LPCOMMCONFIG) new BYTE[1];\r\n\tBOOL ret = GetDefaultCommConfig(strPort, lpCC, &dwSize);\r\n\tdelete [] lpCC;\t \r\n\r\n\tlpCC = (LPCOMMCONFIG) new BYTE[dwSize];\r\n\tret = GetDefaultCommConfig(strPort, lpCC, &dwSize);\r\n\tdelete [] lpCC; \r\n\r\n\tif(ret) ports.push_back(strPort);\r\n }\r\n}<\/pre>\nHere is an example of how to use this function:<\/p>\n
int _tmain(int argc, _TCHAR* argv[])\r\n{\r\n std::vector< tstring > ports;\r\n DetectComPorts(ports); \r\n\r\n for(std::vector< tstring >::const_iterator it = ports.begin(); it != ports.end(); ++it)\r\n {\r\n\tstd::cout << *it << std::endl;\r\n } \r\n\r\n return 0;\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"I’ve seen this question many times asked in forums. Unfortunatelly, not all the answers are ok. A a good wait to find the available COM ports is by using function GetDefaultCommConfig, that returns the default configuration for a specified communication device. Following code shows how to use it: #include <vector> #include <string> \/\/ this can … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[7,8],"tags":[],"class_list":["post-69","post","type-post","status-publish","format-standard","hentry","category-c","category-windows-programming"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t