pinvoke and AdjustWindowRect

  • Thread starter Thread starter Tom Dacon
  • Start date Start date
T

Tom Dacon

I just converted a VS2003 application to VS2005, and my calls to
AdjustWindowRect (which seemed to work fine in VS2003) are pulling a runtime
error in VS2005, as follows:

A call to PInvoke function
'Graphics!DSC.Utilities.Graphics.Win32RECT::AdjustWindowRect' has unbalanced
the stack. This is likely because the managed PInvoke signature does not
match the unmanaged target signature. Check that the calling convention and
parameters of the PInvoke signature match the target unmanaged signature.

Here's my declaration:

[DllImport("user32.dll", EntryPoint="AdjustWindowRect")]
public static extern bool AdjustWindowRect(ref Win32RECT clientCorners,
ulong dwStyle, bool bMenu);


My Win32RECT struct, which is impersonating a Windows API struct, looks in
part like this:


typedef struct _RECT {
LONG left;
LONG top;
LONG right;
LONG bottom;
} RECT, *PRECT;
 
Tom Dacon said:
I just converted a VS2003 application to VS2005, and my calls to
AdjustWindowRect (which seemed to work fine in VS2003) are pulling a
runtime error in VS2005, as follows:

A call to PInvoke function
'Graphics!DSC.Utilities.Graphics.Win32RECT::AdjustWindowRect' has
unbalanced the stack. This is likely because the managed PInvoke signature
does not match the unmanaged target signature. Check that the calling
convention and parameters of the PInvoke signature match the target
unmanaged signature.

Here's my declaration:

[DllImport("user32.dll", EntryPoint="AdjustWindowRect")]
public static extern bool AdjustWindowRect(ref Win32RECT clientCorners,
ulong dwStyle, bool bMenu);
Click to expand...

Your declarations are wrong. 'ulong' and 'long' are 64-bit types, but
'DWORD' is always a 32-bit type:

\\\
[DllImport("user32.dll")]
public static extern bool AdjustWindowRect(
ref RECT lpRect,
Int32 dwStyle,
bool bMenu
);

[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
Int32 left;
Int32 top;
Int32 right;
Int32 bottom;
}
///
 
Thanks, Herfried. I figured that out while I was composing another message.
What puzzles me now is how it worked in the VS2003 version.

Tom Dacon
Dacon Software Consulting

Herfried K. Wagner said:
Tom Dacon said:
I just converted a VS2003 application to VS2005, and my calls to
AdjustWindowRect (which seemed to work fine in VS2003) are pulling a
runtime error in VS2005, as follows:

A call to PInvoke function
'Graphics!DSC.Utilities.Graphics.Win32RECT::AdjustWindowRect' has
unbalanced the stack. This is likely because the managed PInvoke
signature does not match the unmanaged target signature. Check that the
calling convention and parameters of the PInvoke signature match the
target unmanaged signature.

Here's my declaration:

[DllImport("user32.dll", EntryPoint="AdjustWindowRect")]
public static extern bool AdjustWindowRect(ref Win32RECT clientCorners,
ulong dwStyle, bool bMenu);
Click to expand...

Your declarations are wrong. 'ulong' and 'long' are 64-bit types, but
'DWORD' is always a 32-bit type:

\\\
[DllImport("user32.dll")]
public static extern bool AdjustWindowRect(
ref RECT lpRect,
Int32 dwStyle,
bool bMenu
);

[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
Int32 left;
Int32 top;
Int32 right;
Int32 bottom;
}
///
Click to expand...
 
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