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i finally found the problem sir thanks for your advice.......(it because i dont fill the blank textbox with a integer)

i want to convert the string to integer by write number on it/textbox and convert it again to hex values.....and one of the offset i want to write is contain a value of "0" like "00000000" can it is...

i,am new user in VB and just start to programming and when i debug then pop up "Conversion from string "" to type 'Integer' is not valid" it always pop up when i press a the button 2 as write file
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