Win32 Api: How create Open/"Save as" Dialog?

[Marcone]

On Saturday, 11 January 2020 at 14:21:25 UTC, Adam D. Ruppe wrote:
> On Saturday, 11 January 2020 at 12:22:25 UTC, Marcone wrote:
>>     wchar[1024] szFileName = 0;
>>     ofn.lpstrFile = cast(LPWSTR) szFileName;
>
> You shouldn't cast there, just use `szFileName.ptr` instead.
>
>>     ofn.nMaxFile = MAX_PATH;
>
> and this should be the length of the array. It may require a 
> case
>
> nMaxFile = cast(DWORD) szFileName.length;

Changed! New code with changes working very well:

import std;
import core.sys.windows.windows;
pragma(lib, "comdlg32");

// Function askopenfilename()
string askopenfilename(const(wchar)* filter = "All Files 
(*.*)\0*.*\0"){
     OPENFILENAME ofn;
     wchar[1024] szFileName = 0;
     ofn.lpstrFile = szFileName.ptr;
     ofn.lpstrFilter = filter;
     ofn.nMaxFile = cast(DWORD) szFileName.length;
     ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | 
OFN_HIDEREADONLY;
     if (GetOpenFileNameW(&ofn)){
         return to!string(szFileName[0..szFileName.indexOf('\0')]);
     } else {
         return "";
     }
}


void main(){
     writeln(askopenfilename()); // Call without filter.
     writeln(askopenfilename("Text Files (*.txt)\0*.txt\0All Files 
(*.*)\0*.*\0")); // Cal using filter.
}