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+---- Thread: API Questions (/showthread.php?tid=1918)
RE: API Questions - a740g - 08-20-2023
(08-20-2023, 06:15 PM)Jack Wrote: with all due respect to a740g, I am not comfortable with the padding in MENUITEMINFO80 is correct.
this C code prints 80 as the size of MENUITEMINFO
Code: (Select All)#include <stdio.h>
#include <windows.h>
#include <winuser.h>
int main(void){
printf("%lld\n", sizeof(MENUITEMINFO));
return 0;
}
Quote:Len of MENUITEMINFO = 80Steve is correct. Without the padding it will be far less than 80 and crash.
sizeof(MENUITEMINFO) = 80
RE: API Questions - SMcNeill - 08-20-2023
(08-20-2023, 06:15 PM)Jack Wrote: with all due respect to a740g, I am not comfortable with the padding in MENUITEMINFOTYPE MENUITEMINFO
this C code prints 80 as the size of MENUITEMINFO
Code: (Select All)#include <stdio.h>
#include <windows.h>
#include <winuser.h>
int main(void){
printf("%lld\n", sizeof(MENUITEMINFO));
return 0;
}
AS _UNSIGNED LONG cbSize 4
AS _UNSIGNED LONG fMask 8
AS _UNSIGNED LONG fType 12
AS _UNSIGNED LONG fState 16
AS _UNSIGNED LONG wID 20
AS STRING * 4 __padding1 24
AS _UNSIGNED _OFFSET hSubMenu 32
AS _UNSIGNED _OFFSET hbmpChecked 40
AS _UNSIGNED _OFFSET hbmpUnchecked 48
AS _UNSIGNED _OFFSET dwItemData 56
AS _UNSIGNED _OFFSET dwTypeData ' str ptr 64
AS _UNSIGNED LONG cch 68
AS STRING * 4 __padding2 72
AS _UNSIGNED _OFFSET hbmpItem 80
END TYPE
What's wrong with it?
RE: API Questions - a740g - 08-20-2023
Also, all elements should be at the correct offset (including the padding).
RE: API Questions - a740g - 08-20-2023
(08-20-2023, 05:47 PM)TerryRitchie Wrote:(08-20-2023, 12:01 AM)a740g Wrote: Here. This should work on 64-bit compilers.
Yes it does, thank you! This example should be added to the Windows Library examples in the Wiki.
Could you explain the changes you made and why they needed to be done so I can get a better understanding of your code and why 64-bit needs to be approached differently please?
I actually use the caveman's method.
At least that's what I call it. But it works.I've attached source files that you can use to figure out stuff like these. Note that the results will be different on 32-bit and 64-bit compilers. But you should be able to cover both cases using the QB64 $IF metacommand.
RE: API Questions - SpriggsySpriggs - 08-20-2023
I find that using OFFSETOF in a header helps quite a bit with making sure each type member is the right size and in the right position.