Giáo Trình How To Use AutoIt A Professional Manner part 107 ppsx

Example If Not IsDeclared ("a") then MsgBox(0,"", "$a is NOT declared") ; $a has never been assigned EndIf $a=1 If IsDeclared ("a") then MsgBox(0,"", "$a IS declared" ) ; due to previous $a=1 assignment EndIf Function Reference IsDllStruct Checks if a variable is a DllStruct type. IsDllStruct ( variable ) Parameters variable The variable/expression to check. Return Value Success: Returns 1. Failure: Returns 0 if expression is not DllStruct type as return by DllStructCreate. Remarks None. Related DllStructCreate Example $struct = DllStructCreate("char[256]") $x = IsDllStruct($struct) Function Reference IsFloat Checks if a variable or expression is a float-type. IsFloat ( variable ) Parameters variable The variable or expression to check. Return Value Success: Returns 1. Failure: Returns 0 if expression is not float type. Remarks See examples. Related IsArray, IsInt, IsString, IsNumber, IsBool, IsHWnd, StringIsFloat Example IsFloat(3.14159) ;returns 1 IsFloat(3.000) ;returns 0 since value is integer 3 IsFloat(1/2 - 5) ;returns 1 IsFloat(1.5e3) ;returns 0 since 1.5e3 = 1500 IsFloat("12.345") ;returns 0 since is a string Function Reference IsHWnd Checks if a variable's base type is a pointer and window handle. IsHWnd ( variable ) Parameters variable The variable/expression to check. Return Value Success: Returns 1 if the expression is a pointer type AND a valid window handle. Failure: Returns 0 if expression is not a pointer OR not a valid window handle. Remarks Related IsArray, IsFloat, IsInt, IsPtr, IsString, IsNumber, IsBool Example Run("notepad.exe") Local $hWnd = WinGetHandle("[CLASS:Notepad]") If IsHWnd($hWnd) Then MsgBox(4096, "", "It's a valid HWND") Else MsgBox(4096, "", "It's not an HWND") EndIf Function Reference IsHWnd Checks if a variable's base type is a pointer and window handle. IsHWnd ( variable ) Parameters variable The variable/expression to check. Return Value Success: Returns 1 if the expression is a pointer type AND a valid window handle. Failure: Returns 0 if expression is not a pointer OR not a valid window handle. Remarks Related IsArray, IsFloat, IsInt, IsPtr, IsString, IsNumber, IsBool Example Run("notepad.exe") Local $hWnd = WinGetHandle("[CLASS:Notepad]") If IsHWnd($hWnd) Then MsgBox(4096, "", "It's a valid HWND") Else MsgBox(4096, "", "It's not an HWND") EndIf Function Reference IsInt Checks if a variable or expression is an integer type. IsInt ( variable ) Parameters variable The variable/expression to check. Return Value Success: Returns 1. Failure: Returns 0 if expression is not integer. Remarks IsInt(7.5 - 2.5) returns 1 (meaning true). Related IsArray, IsFloat, IsString, IsNumber, IsBool, IsHWnd, StringIsInt Example IsInt(-12345) ;returns 1 IsInt(3.0000) ;returns 1 IsInt("5432") ;returns 0 since is a string IsInt(7.5 - 4.5) ;returns 1 since evaluates to integer 3 Function Reference IsKeyword Checks if a variable is a keyword (for example, Default). IsKeyword ( variable ) Parameters variable The variable to check. Return Value Success: Returns 1 if variable is a keyword. Failure: Returns 0 if variable is not a keyword. Remarks Related Default Example $a = default If IsKeyword($a) Then MsgBox(0,"Ok", "Yes it is") Function Reference IsBool Checks if a variable's base type is boolean. IsBool ( variable ) Parameters variable The variable/expression to check. Return Value Success: Returns 1. Failure: Returns 0 if expression is not boolean type. Remarks Related IsArray, IsFloat, IsInt, IsNumber, IsString, IsHWnd Example $b = true If IsBool($b) Then Msgbox(0,"Success", "$b is a boolean variable") Function Reference IsDeclared Check if a variable has been declared. IsDeclared ( expression ) Parameters expression string representing name of the variable to be checked. Return Value Success: Returns 1 for Global variable or variable declared outside functions. Special: -1 for Local variable. Failure: Return 0 when no variable can be found. Remarks If there is a need to use IsDeclared() to check that a variable exists, then in most situations Assign() should be used to create/write to the variable and Eval() should be used to read from the variable. Related Assign, Eval Example If Not IsDeclared ("a") then MsgBox(0,"", "$a is NOT declared") ; $a has never been assigned EndIf $a=1 If IsDeclared ("a") then MsgBox(0,"", "$a IS declared" ) ; due to previous $a=1 assignment EndIf Function Reference IsDllStruct Checks if a variable is a DllStruct type. IsDllStruct ( variable ) Parameters variable The variable/expression to check. Return Value Success: Returns 1. Failure: Returns 0 if expression is not DllStruct type as return by DllStructCreate. Remarks None. Related DllStructCreate Example $struct = DllStructCreate("char[256]") $x = IsDllStruct($struct) Function Reference IsFloat Checks if a variable or expression is a float-type. IsFloat ( variable ) Parameters variable The variable or expression to check. Return Value Success: Returns 1. [...]... variable's base type is a pointer and window handle IsHWnd ( variable ) Parameters variable The variable/expression to check Return Value Success: Returns 1 if the expression is a pointer type AND a valid window handle Failure: Returns 0 if expression is not a pointer OR not a valid window handle Remarks Related IsArray, IsFloat, IsInt, IsPtr, IsString, IsNumber, IsBool Example Run("notepad.exe") Local $hWnd...Failure: Returns 0 if expression is not float type Remarks See examples Related IsArray, IsInt, IsString, IsNumber, IsBool, IsHWnd, StringIsFloat Example IsFloat(3.14159) ;returns 1 IsFloat(3.000) ;returns 0 since value is integer 3 IsFloat(1/2 - 5) ;returns 1 IsFloat(1.5e3) ;returns 0 since 1.5e3 = 1500 IsFloat("12.345") ;returns 0 since is a string Function Reference IsHWnd Checks if a variable's... IsNumber, IsBool Example Run("notepad.exe") Local $hWnd = WinGetHandle("[CLASS:Notepad]") If IsHWnd($hWnd) Then MsgBox(4096, "", "It's a valid HWND") Else MsgBox(4096, "", "It's not an HWND") EndIf Function Reference IsInt Checks if a variable or expression is an integer type IsInt ( variable ) Parameters variable The variable/expression to check . check that a variable exists, then in most situations Assign() should be used to create/write to the variable and Eval() should be used to read from the variable. Related Assign, Eval Example. Global variable or variable declared outside functions. Special: -1 for Local variable. Failure: Return 0 when no variable can be found. Remarks If there is a need to use IsDeclared() to. Checks if a variable is a keyword (for example, Default). IsKeyword ( variable ) Parameters variable The variable to check. Return Value Success: Returns 1 if variable is a keyword. Failure: