Working correctly with the Windows Registry might prove a little difficult, especially for beginners. One thing one should care about for example is using the correct access rights (not just the default ones) when creating a registry key. To ease the burden of directly using the Win32 registry API, I decided to wrap them inside two classes and make them available for anyone that wants to use them.<\/p>\n
The classes that I put together are:<\/p>\n
To create a key you should use RegistryUtils::CreateKey<\/em>. It takes a handle to an open key (usually one of the predefined keys HKEY_CURRENT_USER<\/tt>, HKEY_LOCAL_MACHINE<\/tt>, etc. or an already opened key), the name of\u00a0the subkey the function opens or creates and\u00a0the desire access rights. It returns the handle to the opened or created key as the first argument, and a value indicating the success or failure.<\/p>\n To write a string use either RegistryUtils::WriteString<\/tt> or RegistryUtilsEx::WriteString<\/tt> string if you use STL std::string<\/tt> or std::wstring<\/tt>. It takes the handle to the key, the name of the value and the value to write.<\/p>\n To read a string use either RegistryUtils::ReadString<\/tt> or RegistryUtilsEx::ReaderString<\/tt>, the later for working with STL’s strings.<\/p>\n Simillary, you can use ReadDword()<\/tt> and WriteDword()<\/tt> for reading and writing integer values, and ReadBinary()<\/tt> and WriteBinary()<\/tt> for generic binary data.<\/p>\n To close an opened key call RegistryUtils::CloseKey().<\/p>\n Additionally, RegistryUtils::DeleteKey()<\/tt> can be used to delete a specified key, along with all its sub-keys and values.<\/p>\n The code is available for download here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" Working correctly with the Windows Registry might prove a little difficult, especially for beginners. One thing one should care about for example is using the correct access rights (not just the default ones) when creating a registry key. To ease the burden of directly using the Win32 registry API, I decided to wrap them inside … 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":[451,212,459],"class_list":["post-42","post","type-post","status-publish","format-standard","hentry","category-c","category-windows-programming","tag-c","tag-registry","tag-windows"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\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\r\nHKEY hKey = NULL; \r\n\/\/ create or open the key \r\nRegistryUtils::RegResult OpenMode = RegistryUtils::CreateKey(HKEY_CURRENT_USER, \r\n\t\t_T(\"Software\\Bancila\\Test\"), \r\n\t\tKEY_READ|KEY_WRITE, \r\n\t\thKey);<\/pre>\n
\r\nRegistryUtilsEx::WriteString(hKey, _T(\"key1\"), _T(\"value1\"));<\/pre>\n
\r\ntstring str; \r\n\/\/ read a string \r\nif(RegistryUtils::Success != RegistryUtilsEx::ReadString(hKey, _T(\"key1\"), str)) \r\n{ \r\n \/\/ if not present, write it in registry \r\n RegistryUtilsEx::WriteString(hKey, _T(\"key1\"), _T(\"value1\")); \r\n\r\n \/\/ now it should be read \r\n RegistryUtilsEx::ReadString(hKey, _T(\"key1\"), str); \r\n}<\/pre>\n\r\n\/\/ read an integer \r\nDWORD number; \r\nif(RegistryUtils::Success != RegistryUtils::ReadDword(hKey, _T(\"key2\"), number)) \r\n{ \r\n \/\/ if not present in the registry, write it \r\n RegistryUtils::WriteDword(hKey, _T(\"key2\"), 44); \r\n\r\n \/\/ this time it should be read \r\n RegistryUtils::ReadDword(hKey, _T(\"key2\"), number); \r\n}<\/pre>\n\r\nRegistryUtils::CloseKey(hKey);<\/pre>\n