想請問各位 我開了一個新的執行緒 預設是新的執行緒可以直接使用原本主程式的form1物件 那如果在主程式有一個變數，假設是int num 那可以讓新的執行緒共享主程式下的int num嗎 如果可以的話 請問要如何做呢 謝謝

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我是新手

Please notice that VCL is not thread safe. If you want to share the field variable, I would recommend protecting in side a critical session (this should be easier to implement than other methods). 

引言: Please notice that VCL is not thread safe. If you want to share the field variable, I would recommend protecting in side a critical session (this should be easier to implement than other methods). < face="Verdana, Arial, Helvetica"> I don't really understand why VCL is not thread safe. Could you illustrate and clarify under what kind of situation would cause this unexpected crisis. Jesse Chan

引言:I don't really understand why VCL is not thread safe. Could you illustrate and clarify under what kind of situation would cause this unexpected crisis. Jesse Chan

I think that VCL was not designed for multi-thread application. Unexpected result like screen glitch, application lockup or access violation could happen RANDOMLY if you are accessing VCL (e.g. progress bar) in different threads without the use of Synchorize.

Whether should I avoid to use VCL under multi-thread environment, or, in the other hand, would you give me some advices to use safely. By the way, what you mentioned "Synchorize" is some kind of BCB mechanism or just keep all of varibles synchronized? Jesse Chan

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Jesse Chan

No need to aviod using VCL in thread, just be careful when using it. Synchorize is a method of TThread, which is mainly use to perform update for VCL using the main thread. Please look at the help for more details. 

引言: No need to aviod using VCL in thread, just be careful when using it. Synchorize is a method of TThread, which is mainly use to perform update for VCL using the main thread. Please look at the help for more details. < face="Verdana, Arial, Helvetica"> Got it, thanks. Jesse Chan

引言: 我開了一個新的執行緒 預設是新的執行緒可以直接使用原本主程式的form1物件 那如果在主程式有一個變數，假設是int num 那可以讓新的執行緒共享主程式下的int num嗎 如果可以的話 請問要如何做呢

msce 你好: 如果你還是不太了解的話 請參考以下幾篇文章(有 sample code)< > > 備註: 如果覺得以上幾篇文章內容很好的話 要記得「推薦」給分~~鼓勵原作者的用心< > --