private sub map1_mousemove(button as integer, shift as integer, x as single, y as single)
dim x1 as double
dim y1 as double
dim x2 as double
dim y2 as double
dim sngtemp as single
dim tempzoom as integer
on error resume next
map1.numericcoordsys.set milonglat, 0 '將螢幕座標轉變為經緯度座標
if button = vbleftbutton and map1.currenttool = mtzoominout then
while boolbuttonmove
if abs(y - map1.mapscreenheight / 2) > map1.mapscreenheight / 1000 then
if y > map1.mapscreenheight / 2 and y >= sgly then
'縮小tempzoom = map1.zoom + 10 * abs(y - map1.mapscreenheight / 2) / map1.mapscreenheight
if tempzoom < 600 and tempzoom > 0 then
map1.zoom = tempzoom
end if
sgly = y
elseif y < map1.mapscreenheight / 2 and y <= sgly then
'放大/
tempzoom = mainform.map1.zoom - 10 * abs(y - map1.mapscreenheight / 2) /map1.mapscreenheight
if tempzoom > 0 and tempzoom < 600 then
map1.zoom = tempzoom
else
if map1.zoom > 0.001 then
map1.zoom = map1.zoom / 2
end if
end if
sgly = y
end if
end if
doevents
wend
end if
end sub
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