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            春暖花開(kāi)
            雪化了,花開(kāi)了,春天來(lái)了
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            今天在做東西的時(shí)候,用LoadString遇到了一些問(wèn)題.可能大家日后也會(huì)用到,分享一下.

            LoadString 從資源載入字符串,我們一般這么用。
            舉個(gè)例子:
            TCHAR str[20];
            LoadString(hInstance, IDS_STR, str, 20);

            如果我們的字符串的長(zhǎng)度不知道,或許它會(huì)變化的話,我們?cè)趺磥?lái)獲得資源ID對(duì)應(yīng)的字符串呢?這就要用到
            LoadString的另一種用法,我們可以這樣用
            LPCTSTR lpcStr = (LPCTSTR)LoadString(hInstance, IDS_STR, NULL, 0);

            感覺(jué)上沒(méi)有什么問(wèn)題啊?

            但是實(shí)際應(yīng)用中又出現(xiàn)問(wèn)題了,讀出的字符串沒(méi)有截?cái)嗵幚恚讼乱粋€(gè)ID包含的字符串或者更多。

            怎么辦?在MSDN中,LoadString已經(jīng)清楚地指出
            lpBuffer is set to NULL, the return value is a pointer to the requested string. The caller should cast the return value to an LPCTSTR. This pointer points directly to the resource, so the string is read-only. The length of the string, not including any terminating null character, can be found in the word preceding the string.

            同時(shí)它也給出了解決辦法:
            To use the lpBuffer pointer, the n flag must be set with the resource compiler, RC.
            Note   String resources are not null-terminated by default. When lpBuffer is set to NULL, verify whether the string resource represented by the pointer returned by LoadString is null-terminated, and if necessary, append a terminating null character to the resource before using it in your application.

            一開(kāi)始我沒(méi)有太明白the n flag must be set with the resource compiler, RC.的含義,很迷惑,不知道如何解決。但是在網(wǎng)上尋找方法的時(shí)候,發(fā)現(xiàn)這么一篇文章
            http://lak4cyut.blogspot.com/2008/08/wm-api-loadstring.htmlWM API : LoadString() 另一種使用方式),我才徹底明白過(guò)來(lái)。

            我使用的是VS2005,在project->properties->Resource->Command Line中添加一個(gè) “-n”,即可。

            在運(yùn)行程序,正常顯示了。

            大家如遇相同問(wèn)題,可以試試這個(gè)方法。
            posted on 2008-12-17 20:07 Sandy 閱讀(6642) 評(píng)論(8)  編輯 收藏 引用 所屬分類(lèi): windows學(xué)習(xí)

            FeedBack:
            # re: LoadString的一些小用法
            2008-12-17 23:24 | 萬(wàn)連文
            看看VC的CString的LoadString的方法,可以自己封裝一個(gè)Win32版本的,你這個(gè)方法不是那么徹底解決問(wèn)題。  回復(fù)  更多評(píng)論
              
            # re: LoadString的一些小用法
            2008-12-18 08:28 | Sandy
            @萬(wàn)連文
            這個(gè)我還真的沒(méi)有想到.謝謝提醒.我自己也封裝了一個(gè),可是用起來(lái)比較麻煩,我去看看CString的LoadString怎么實(shí)現(xiàn)的.  回復(fù)  更多評(píng)論
              
            # re: LoadString的一些小用法
            2008-12-18 22:30 | dell筆記本
            不錯(cuò),好東西  回復(fù)  更多評(píng)論
              
            # re: LoadString的一些小用法
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