I am using flat assembler 1.72

I was working on a bigger program (64bit) and could not get the printdlg box to appear. To simplify things I copied the "examples win64 template" and modified it so a left click on the mouse would call the dialog box.

I added 3 items to the data section

msg MSG
hinstance dq ?
hwnd_main dq ?
pd PRINTDLG

In addition comdlg32 was added to the library and includes

user32,'USER32.DLL',\
comdlg32,'COMDLG32.DLL'

include 'api\kernel32.inc'
include 'api\user32.inc'
include 'api\comdlg32.inc'

Following the windows 32bit example the data structure was loaded with data making sure the larger operands were used where required.

Here is the problem:

The first value in the data structure is the size of the structure. If I use sizeof.PRINTDLG to load pd.lStructureSize then this value is loaded with 74h and the printer dialog box fails to appear.

However, if pd.lStructureSize is set to 78h the dialog box appears.

What am I doing wrong? How should one fix this problem?

I suspect the dialog definition is wrong. Tomasz will have to fix it, or you can manually modify it yourself.

After this line: there probably should be some padding to align the following dq values correctly. The easiest might be to simply add one more question mark. I've marked this topic as a bug.

I have updated the Windows package.

Thank you