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Or in MsgBox FunctionCan someone explain to me what the Or does here?
Dim intReply as Integer = _ MsgBox(strPrompt, MsgBoxStyle.OKCancel Or MsgBoxStyle.Critical Or MsgBoxStyle.DefaultButton2, strTitle) I don't have VB on this cpu... will it display the ok and cancel buttons and the critical icon ... i still don't understand DefaultButton, can someone explain that to me as well? Thanks! James wrote:
> Can someone explain to me what the Or does here? In this context, Or is the bitwise operator. It allows you to combine > > Dim intReply as Integer = _ > MsgBox(strPrompt, MsgBoxStyle.OKCancel Or > MsgBoxStyle.Critical Or MsgBoxStyle.DefaultButton2, > strTitle) > > I don't have VB on this cpu... will it display the ok and cancel > buttons and the critical icon ... i still don't understand > DefaultButton, can someone explain that to me as well? Thanks! > bitfield values. In the way it's being used, it's exactly the same as using + For example If OKCancel = 1 and Critical = 2 and DefaultButton2 = 4 then OKCancel Or Critical Or DefaultButton2 = 7 OKCancel + Critical + DefaultButton2 = 7 However Or is the better way to do it, since it keeps you from adding the same value twice: OKCancel + Critical + DefaultButton2 + OKCancel = 8 OKCancel Or Critical Or DefaultButton2 Or OKCancel = 7 Do an Internet search for "Bitwise Operators" and you'll probably find some better explanations. DefaultButton determines which button on the Message Box has focus when it is shown. If you pick DefaultButton2 and OKCancel then Cancel would be in focus an would be the action if the user pressed the space bar or the Enter key. DefaultButton1 would be the OK button (left to right). Adam Ruth so since sgBoxStyle.OKCancel = 1
MsgBoxStyle.Critical = 16 MsgBoxStyle.DefaultButton2 = 256 does that make the bitwise value 273? which is then the value of intReply? Sorry, I've never delt with this "bitwise" stuff... What is this used for? Thanks! Adam Ruth wrote: Show quoteHide quote > James wrote: > > Can someone explain to me what the Or does here? > > > > Dim intReply as Integer = _ > > MsgBox(strPrompt, MsgBoxStyle.OKCancel Or > > MsgBoxStyle.Critical Or MsgBoxStyle.DefaultButton2, > > strTitle) > > > > I don't have VB on this cpu... will it display the ok and cancel > > buttons and the critical icon ... i still don't understand > > DefaultButton, can someone explain that to me as well? Thanks! > > > > In this context, Or is the bitwise operator. It allows you to combine > bitfield values. In the way it's being used, it's exactly the same as > using + For example > > If OKCancel = 1 and Critical = 2 and DefaultButton2 = 4 then > > OKCancel Or Critical Or DefaultButton2 = 7 > OKCancel + Critical + DefaultButton2 = 7 > > However Or is the better way to do it, since it keeps you from adding > the same value twice: > > OKCancel + Critical + DefaultButton2 + OKCancel = 8 > OKCancel Or Critical Or DefaultButton2 Or OKCancel = 7 > > Do an Internet search for "Bitwise Operators" and you'll probably find > some better explanations. > > DefaultButton determines which button on the Message Box has focus when > it is shown. If you pick DefaultButton2 and OKCancel then Cancel would > be in focus an would be the action if the user pressed the space bar or > the Enter key. DefaultButton1 would be the OK button (left to right). > > Adam Ruth James wrote:
> so since sgBoxStyle.OKCancel = 1 Correct, the total of those values is 273. intReply in your example > MsgBoxStyle.Critical = 16 > MsgBoxStyle.DefaultButton2 = 256 > > does that make the bitwise value 273? which is then the value of > intReply? would actually be set to a value of type MsgBoxResult which would indicate which button the user pressed. 273 is a number that is passed to the function which tells the function how to display the message box. > Sorry, I've never delt with this "bitwise" stuff... What is No problem, it can be a bit confusing when first encountered. Bitfields > this used for? Thanks! are a way to combine several options into one parameter. Instead of having separate parameters for each of the options, you combine the set of options into one number with the Or operator. You'll notice that the values for each of the options are each double the other one, you have 1, 2, 4, 8, 16, 32, 64, 256, etc. This is because each number represents a bit in a 32-bit number. Wikipedia has a good description of how bitwise operations work. Think of the options parameter as a set of 32 on/off switches and each of the options (that are joined with Or) as turning on one of the 32 options. http://en.wikipedia.org/wiki/Bitwise Adam Ruth You might check out the Flags attribute for Enumerations. The Flag attribute
makes the or'ing of different enumerations possible such that the receiving code, i.e.,, msgbox code, can easily decipher what different values of the Enumeration are passed. -- Show quoteHide quoteDennis in Houston "James" wrote: > so since sgBoxStyle.OKCancel = 1 > MsgBoxStyle.Critical = 16 > MsgBoxStyle.DefaultButton2 = 256 > > does that make the bitwise value 273? which is then the value of > intReply? Sorry, I've never delt with this "bitwise" stuff... What is > this used for? Thanks! > > > Adam Ruth wrote: > > James wrote: > > > Can someone explain to me what the Or does here? > > > > > > Dim intReply as Integer = _ > > > MsgBox(strPrompt, MsgBoxStyle.OKCancel Or > > > MsgBoxStyle.Critical Or MsgBoxStyle.DefaultButton2, > > > strTitle) > > > > > > I don't have VB on this cpu... will it display the ok and cancel > > > buttons and the critical icon ... i still don't understand > > > DefaultButton, can someone explain that to me as well? Thanks! > > > > > > > In this context, Or is the bitwise operator. It allows you to combine > > bitfield values. In the way it's being used, it's exactly the same as > > using + For example > > > > If OKCancel = 1 and Critical = 2 and DefaultButton2 = 4 then > > > > OKCancel Or Critical Or DefaultButton2 = 7 > > OKCancel + Critical + DefaultButton2 = 7 > > > > However Or is the better way to do it, since it keeps you from adding > > the same value twice: > > > > OKCancel + Critical + DefaultButton2 + OKCancel = 8 > > OKCancel Or Critical Or DefaultButton2 Or OKCancel = 7 > > > > Do an Internet search for "Bitwise Operators" and you'll probably find > > some better explanations. > > > > DefaultButton determines which button on the Message Box has focus when > > it is shown. If you pick DefaultButton2 and OKCancel then Cancel would > > be in focus an would be the action if the user pressed the space bar or > > the Enter key. DefaultButton1 would be the OK button (left to right). > > > > Adam Ruth > > Hi Dennis,
Just last week I looked this stuff up "again" and it appears that the Flags attribute doesn't really affect the way the bitmask works, just how the ..ToString() function treats the value. Correct me if I'm wrong... Steve Show quoteHide quote "Dennis" <Den***@discussions.microsoft.com> wrote in message news:E8AD6D15-9CAF-4F08-A37F-DA4CD449DBD3@microsoft.com... > You might check out the Flags attribute for Enumerations. The Flag > attribute > makes the or'ing of different enumerations possible such that the > receiving > code, i.e.,, msgbox code, can easily decipher what different values of the > Enumeration are passed. > > -- > Dennis in Houston > > > "James" wrote: > >> so since sgBoxStyle.OKCancel = 1 >> MsgBoxStyle.Critical = 16 >> MsgBoxStyle.DefaultButton2 = 256 >> >> does that make the bitwise value 273? which is then the value of >> intReply? Sorry, I've never delt with this "bitwise" stuff... What is >> this used for? Thanks! >> >> >> Adam Ruth wrote: >> > James wrote: >> > > Can someone explain to me what the Or does here? >> > > >> > > Dim intReply as Integer = _ >> > > MsgBox(strPrompt, MsgBoxStyle.OKCancel Or >> > > MsgBoxStyle.Critical Or MsgBoxStyle.DefaultButton2, >> > > strTitle) >> > > >> > > I don't have VB on this cpu... will it display the ok and cancel >> > > buttons and the critical icon ... i still don't understand >> > > DefaultButton, can someone explain that to me as well? Thanks! >> > > >> > >> > In this context, Or is the bitwise operator. It allows you to combine >> > bitfield values. In the way it's being used, it's exactly the same as >> > using + For example >> > >> > If OKCancel = 1 and Critical = 2 and DefaultButton2 = 4 then >> > >> > OKCancel Or Critical Or DefaultButton2 = 7 >> > OKCancel + Critical + DefaultButton2 = 7 >> > >> > However Or is the better way to do it, since it keeps you from adding >> > the same value twice: >> > >> > OKCancel + Critical + DefaultButton2 + OKCancel = 8 >> > OKCancel Or Critical Or DefaultButton2 Or OKCancel = 7 >> > >> > Do an Internet search for "Bitwise Operators" and you'll probably find >> > some better explanations. >> > >> > DefaultButton determines which button on the Message Box has focus when >> > it is shown. If you pick DefaultButton2 and OKCancel then Cancel would >> > be in focus an would be the action if the user pressed the space bar or >> > the Enter key. DefaultButton1 would be the OK button (left to right). >> > >> > Adam Ruth >> >> All I know is what I read in the MSDN under Flags attributes.
-- Show quoteHide quoteDennis in Houston "Steve Long" wrote: > Hi Dennis, > Just last week I looked this stuff up "again" and it appears that the Flags > attribute doesn't really affect the way the bitmask works, just how the > ..ToString() function treats the value. > > Correct me if I'm wrong... > Steve > > "Dennis" <Den***@discussions.microsoft.com> wrote in message > news:E8AD6D15-9CAF-4F08-A37F-DA4CD449DBD3@microsoft.com... > > You might check out the Flags attribute for Enumerations. The Flag > > attribute > > makes the or'ing of different enumerations possible such that the > > receiving > > code, i.e.,, msgbox code, can easily decipher what different values of the > > Enumeration are passed. > > > > -- > > Dennis in Houston > > > > > > "James" wrote: > > > >> so since sgBoxStyle.OKCancel = 1 > >> MsgBoxStyle.Critical = 16 > >> MsgBoxStyle.DefaultButton2 = 256 > >> > >> does that make the bitwise value 273? which is then the value of > >> intReply? Sorry, I've never delt with this "bitwise" stuff... What is > >> this used for? Thanks! > >> > >> > >> Adam Ruth wrote: > >> > James wrote: > >> > > Can someone explain to me what the Or does here? > >> > > > >> > > Dim intReply as Integer = _ > >> > > MsgBox(strPrompt, MsgBoxStyle.OKCancel Or > >> > > MsgBoxStyle.Critical Or MsgBoxStyle.DefaultButton2, > >> > > strTitle) > >> > > > >> > > I don't have VB on this cpu... will it display the ok and cancel > >> > > buttons and the critical icon ... i still don't understand > >> > > DefaultButton, can someone explain that to me as well? Thanks! > >> > > > >> > > >> > In this context, Or is the bitwise operator. It allows you to combine > >> > bitfield values. In the way it's being used, it's exactly the same as > >> > using + For example > >> > > >> > If OKCancel = 1 and Critical = 2 and DefaultButton2 = 4 then > >> > > >> > OKCancel Or Critical Or DefaultButton2 = 7 > >> > OKCancel + Critical + DefaultButton2 = 7 > >> > > >> > However Or is the better way to do it, since it keeps you from adding > >> > the same value twice: > >> > > >> > OKCancel + Critical + DefaultButton2 + OKCancel = 8 > >> > OKCancel Or Critical Or DefaultButton2 Or OKCancel = 7 > >> > > >> > Do an Internet search for "Bitwise Operators" and you'll probably find > >> > some better explanations. > >> > > >> > DefaultButton determines which button on the Message Box has focus when > >> > it is shown. If you pick DefaultButton2 and OKCancel then Cancel would > >> > be in focus an would be the action if the user pressed the space bar or > >> > the Enter key. DefaultButton1 would be the OK button (left to right). > >> > > >> > Adam Ruth > >> > >> > > > 
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