1）字符串比較比較函數(shù)StrComp ()
語(yǔ)法：StrComp (str1 As String , str2 As String [,ampare As Microsoft.VisualBasic.CompareMethod]) As Integer
說(shuō)明：返回表示str1和str2兩個(gè)字符串參數(shù)比較結(jié)果，若str1小于str2，則返回-1；若str1等于str2，返回0；若str1大于str2，若返回1。選擇性參數(shù)Compare的值有Binary（區(qū)分大小寫）和Text（不區(qū)分大小寫）兩種，前者為默認(rèn)值。
（2）篩選字符串?dāng)?shù)組函數(shù)Filter ()
語(yǔ)法：Filter (Source() As {Object | String},match As String [,include As Boolean [,compare As Microsoft.VisualBasic.CompareMethod ]] As String ()
說(shuō)明：從一維字符串?dāng)?shù)組Source ()中篩選包含match字符串的子數(shù)組。若選擇性參數(shù)include為True（默認(rèn)），表示從字符串?dāng)?shù)組Source ()中篩選包含match字符串的子數(shù)組；若選擇性參數(shù)include為false，表示字符串?dāng)?shù)組source ()中篩選不包含match字符串的子數(shù)組；選擇性參數(shù)compare的值有Binary（區(qū)分大小定）和Text（不區(qū)分大小字）兩種，前者為默認(rèn)值，決定了字符串的比較方式。例如：Source ()={“abc”,”abdfe”,”ghdf”,”pqs”}，那么filter (Source ,”ab”,True,CompareMethod.Binary)會(huì)返回{“abc”,”abdfe”}。
（3）替換字符串函數(shù)RePlace ()
語(yǔ)法：RePlace (str As String , find As String , replacement As String [,start As Integer [,count As Integer [,compare As Microsoft.VisualBasic.CompareMethod ]]] As String
說(shuō)明：將str字符串內(nèi)的find子字符串替換為replacement子字符串。選擇性參數(shù)start表示從str字符串的第start個(gè)字符開始查找find子字符串，默認(rèn)為1；選擇性count表示做幾次替換，默認(rèn)為-1，表示執(zhí)行所有可能的替換；選擇性參數(shù)compare的值有Binary（區(qū)分大小定）和Text（不區(qū)分大小字）兩種，前者為默認(rèn)值，決定了字符串的比較方式。如：str=”shopping list”那么Relace (str,”o”,”i”)會(huì)返回“Shipping list”。
（4）查找字符串函數(shù)InStr ()
語(yǔ)法：InStr (start As Integer , str1 As String , str2 As String [,compare As Microsoft.VisualBasic.CompareMethod]) As String
說(shuō)明：返回str2字符串在str1字符串中第一次出現(xiàn)的位置。若str1為空字符串（“”）或str2沒(méi)有出現(xiàn)在str1或start大于str2的長(zhǎng)度，就返回0；若str2為空字符串(“”)，就返回start；選擇性參數(shù)compare的值有Binary（區(qū)分大小定）和Text（不區(qū)分大小字）兩種，前者為默認(rèn)值，決定了字符串的比較方式。如：Instr (3,”Hell Wold”,0”)返回5。
（5）查找字符串函數(shù)Instrrev ()
語(yǔ)法：InStrRev (str1 As String,Str2 As Interger [,start As Integer [,compare As Microsoft.VisualBasic.compareMethod ]]) As Integer
說(shuō)明：InStrRev ()函數(shù)的用途和InsStr ()函數(shù)相似，但改從字符串的右邊開始檢查str2字符串在str1字符中第一次出現(xiàn)的位置不同。如：InStrRev (“Hello Word”,”0”)返回3。
（6）將字符串?dāng)?shù)組組成單一字符串函數(shù)Join ()
語(yǔ)法：Jon (Source () As {Object | String} [,delimiter As String]) As String
說(shuō)明：將字符串?dāng)?shù)組Source ()內(nèi)的每個(gè)字符串組成單一字符串返回，選擇性參數(shù)delimter表示每個(gè)字符之間的分隔符，默認(rèn)為空字符串（“”）。如：Source ()={“Janifer”,”Peter”,”Jean”,”Robort”},那么Join (Source)會(huì)返回”Janifer Perter Rober”。
（7）將字符串分解成子字符數(shù)組函數(shù)Split ()
語(yǔ)法：Split (str As String [,delimiter As String [,limit As Integer [,compare As Microsoft.VisualBasic.CompareMethod ]]]) As String
說(shuō)明：將組成字符串str的每一個(gè)字符串放進(jìn)字符串?dāng)?shù)組內(nèi)返回。選擇性參數(shù)delimiter表示每個(gè)子字符串之間的分隔符，默認(rèn)值為空字符串（“”）；參數(shù)limit是要返回的子字符串?dāng)?shù)目，默認(rèn)為-1，表示返回所有子字符串；參數(shù)compare的值有Binary（區(qū)分大小定）和Text（不區(qū)分大小字）兩種，前者為默認(rèn)值，決定了字符串的比較方式。如：str=” I am Happy.”,那么Split (str)會(huì)返回字符串?dāng)?shù)組{“I”,”am”,”Happy”}。
