NSIS MessageBox jump offset -

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i'm not able understand what's wrong below code jumping particular offset if messagebox returns idno.

below code quit installer while idno selected, jumping goto endcurrentblock line

    messagebox mb_yesno|mb_iconexclamation "would continue installation?" idno +3     !insertmacro showstatus "failed install software"     goto endcurrentblock     quit

if use absoule label jump it's working good. reason?

jumping offset skips x number of nsis instructions !insertmacro preprocessor instruction might expand zero, 1 or several nsis instructions.

it not recommended combine offset jumps , !insertmacro because can break code changing macro...


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