Learn how to create extensions

[vknow360 (Sunny Gupta)]

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Looking for How to create extensions blocks

Dear all Extension developers, can you please tell me how to add block in java code (sorry for my bad English ) look i am new to this any extension developer can provide there whats app number so that the form will not be flood with my questions Thank you so much for the support friends. Keep up the good work @yusufcihan, @Abhijith_Dominic, @hammerhai, @Ken